Battery and battery manufacturing method

ABSTRACT

A battery includes a first current collector, a first electrode layer, and a first counter electrode layer. The first counter electrode layer is a counter electrode of the first electrode layer, and the first current collector includes a first electroconductive portion, a second electroconductive portion, and a first insulating portion. The first electrode layer is disposed in contact with the first electroconductive portion, and the first counter electrode layer is disposed in contact with the second electroconductive portion. The first insulating portion links the first electroconductive portion and the second electroconductive portion, and the first current collector is folded at the first insulating portion, whereby the first electrode layer and the first counter electrode layer are positioned facing each other.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a continuation of U.S. patent application Ser. No. 15/942,575,filed Apr. 2, 2018, which claims the benefit of Jap. Pat. Appl. No.2017-082830, filed Apr. 19, 2017. The disclosure of each of theabove-identified documents, including the specification, drawings, andclaims, is incorporated herein by reference in its entirety.

1. TECHNICAL FIELD

The present disclosure relates to a battery and a battery manufacturingmethod.

2. DESCRIPTION OF THE RELATED ART

Japanese Unexamined Patent Application Publication No. 8-203539discloses a laminated battery that is formed by disposing positive andnegative electrodes formed in bands, disposed such that both faces ofelectrodes of one polarity face electrodes of the other polarity bybeing folded.

International Publication No. 88/008210 discloses a secondary batteryhaving a structure where a positive electrode and negative electrode arefolded in an alternating manner with separators disposed therebetween.

Japanese Patent No. 5,599,366 discloses a manufacturing method of asolid assembled battery, including a process of folding a band-shapedpositive current collector and a band-shaped negative current collectorin an alternating manner.

SUMMARY

Improved bonding strength of components of the battery is desired in theconventional art.

In one general aspect, the techniques disclosed here feature a batteryincluding a first current collector, a first electrode layer; and afirst counter electrode layer. The first counter electrode layer is acounter electrode of the first electrode layer. The first currentcollector includes a first electroconductive portion, a secondelectroconductive portion, and a first insulating portion. The firstelectrode layer is disposed in contact with the first electroconductiveportion. The first counter electrode layer is disposed in contact withthe second electroconductive portion. The first insulating portion linksthe first electroconductive portion and the second electroconductiveportion. The first current collector is folded at the first insulatingportion, whereby the first electrode layer and the first counterelectrode layer are positioned facing each other.

A battery manufacturing method according to an aspect of the presentdisclosure is a battery manufacturing method using a batterymanufacturing apparatus. The battery manufacturing apparatus includes anelectrode layer forming unit, a counter electrode layer forming unit,and a current collector folding unit that folds a first currentcollector. T herein the first current collector includes a firstelectroconductive portion, a second electroconductive portion, and afirst insulating portion linking the first electroconductive portion andthe second electroconductive portion. The method includes steps of:forming (a1) a first electrode layer in contact with the firstelectroconductive portion by the electrode layer forming unit; forming(b1) the first counter electrode layer, which is a counter electrode ofthe first electrode layer, in contact with the second electroconductiveportion, by the counter electrode layer forming unit; and folding (c1)the first insulating portion by the current collector folding unit. Thefirst electrode layer and the first counter electrode layer arepositioned facing each other, due to the first current collector beingfolded at the first insulating portion by the current collector foldingunit in the folding step (c1).

According to the present disclosure, bonding strength of components ofthe battery can be improved.

It should be noted that general or specific embodiments may beimplemented as a system, a method, an integrated circuit, a computerprogram, a storage medium, or any selective combination thereof.

Additional benefits and advantages of the disclosed embodiments willbecome apparent from the specification and drawings. The benefits and/oradvantages may be individually obtained by the various embodiments andfeatures of the specification and drawings, which need not all beprovided in order to obtain one or more of such benefits and/oradvantages.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a schematic configuration of abattery according to a first embodiment;

FIG. 2 is a diagram illustrating a schematic configuration of an exampleof the battery according to the first embodiment;

FIG. 3 is a diagram illustrating a schematic configuration of an exampleof a first current collector;

FIG. 4 is a diagram illustrating a schematic configuration of an exampleof the first current collector;

FIG. 5 is a diagram illustrating a schematic configuration of an exampleof the first current collector;

FIG. 6 is a perspective view illustrating a schematic configuration of abattery according to the first embodiment;

FIG. 7 is an x-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the first embodiment;

FIG. 8 is a perspective view illustrating a schematic configuration of abattery according to the first embodiment;

FIG. 9 is an x-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the first embodiment;

FIG. 10 is an x-z diagram (cross-sectional view) illustrating aschematic configuration of a battery according to the first embodiment;

FIG. 11 is an x-z diagram (cross-sectional view) illustrating aschematic configuration of a battery according to the first embodiment;

FIG. 12 is an x-z diagram (cross-sectional view) illustrating aschematic configuration of a battery according to the first embodiment;

FIG. 13 is a perspective view illustrating a schematic configuration ofa battery according to a second embodiment;

FIG. 14 is an x-z diagram (cross-sectional view taken along XIV-XIV inFIG. 13) illustrating a schematic configuration of the battery accordingto the second embodiment;

FIG. 15 is a y-z diagram (cross-sectional view taken along XV-XV in FIG.13) illustrating a schematic configuration of the battery according tothe second embodiment;

FIG. 16 is a perspective view illustrating a schematic configuration ofa battery according to the second embodiment;

FIG. 17 is an x-z diagram (cross-sectional view taken along XVII-XIVIIin FIG. 16) illustrating a schematic configuration of the batteryaccording to the second embodiment;

FIG. 18 is a y-z diagram (cross-sectional view taken along XVIII-XVIIIin FIG. 16) illustrating a schematic configuration of the batteryaccording to the second embodiment;

FIG. 19 is a perspective view illustrating a schematic configuration ofa battery according to the second embodiment;

FIG. 20 is an x-z diagram (cross-sectional view taken along XX-XX inFIG. 19) illustrating a schematic configuration of the battery accordingto the second embodiment;

FIG. 21 is a y-z diagram (cross-sectional view taken along XXI-XXI inFIG. 19) illustrating a schematic configuration of the battery accordingto the second embodiment;

FIG. 22 is a perspective view illustrating a schematic configuration ofa battery according to the second embodiment;

FIG. 23 is an x-z diagram (cross-sectional view taken along XXIII-XXIIIin FIG. 22) illustrating a schematic configuration of the batteryaccording to the second embodiment;

FIG. 24 is a y-z diagram (cross-sectional view taken along XXIV-XXIV inFIG. 22) illustrating a schematic configuration of the battery accordingto the second embodiment;

FIG. 25 is a perspective view illustrating a schematic configuration ofa battery according to the second embodiment;

FIG. 26 is an x-z diagram (cross-sectional view taken along XXVI-XXVI inFIG. 25) illustrating a schematic configuration of the battery accordingto the second embodiment;

FIG. 27 is a y-z diagram (cross-sectional view taken along XXVII-XXVIIin FIG. 25) illustrating a schematic configuration of the batteryaccording to the second embodiment;

FIG. 28 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the second embodiment;

FIG. 29 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the second embodiment;

FIG. 30 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the second embodiment;

FIG. 31 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the second embodiment;

FIG. 32 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the second embodiment;

FIG. 33 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery according to the second embodiment;

FIG. 34 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus according to a third embodiment;

FIG. 35 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 36 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus according to the third embodiment;

FIG. 37 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 38 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 39 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 40 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 41 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 42 is a diagram illustrating a schematic configuration of anexample of a first current collector according to the third embodiment;

FIG. 43 is a diagram illustrating an example of a first electrode layerforming step, a second electrode layer forming step, and a thirdelectrode layer forming step;

FIG. 44 is a diagram illustrating an example of a first counterelectrode layer forming step, a second counter electrode layer formingstep, and a third counter electrode layer forming step;

FIG. 45 is a diagram illustrating an example of a first solidelectrolyte layer forming step, a second solid electrolyte layer formingstep, and a third solid electrolyte layer forming step;

FIGS. 46A through 46C are x-z diagrams (cross-sectional views)illustrating schematic configurations of the first current collectorwhere electrode layers, counter electrode layers, and solid electrolytelayers have been formed;

FIG. 47 is an x-z diagram (cross-sectional view) illustrating an exampleof a first insulating portion folding step, a second insulating portionfolding step, and a third insulating portion folding step;

FIG. 48 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus according to the third embodiment;

FIG. 49 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 50 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus according to the third embodiment;

FIG. 51 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 52 is an x-z diagram (cross-sectional view) illustrating an exampleof a first insulating portion shrinking step, a second insulatingportion shrinking step, and a third insulating portion shrinking step;

FIG. 53 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus according to the third embodiment;

FIG. 54 is a diagram illustrating a schematic configuration of anexample of a second current collector according to the third embodiment;

FIG. 55 is a diagram illustrating a schematic configuration of anexample of a second current collector preparation step;

FIG. 56 is a cross-sectional view illustrating an example of acombination of the first current collector and second current collector;

FIG. 57 is a cross-sectional view illustrating an example of acombination of the first current collector and second current collector;

FIG. 58 is a cross-sectional view illustrating an example of acombination of the first current collector and second current collector;

FIG. 59 is a cross-sectional view illustrating an example of acombination of the first current collector and second current collector;

FIG. 60 is a cross-sectional view illustrating an example of acombination of the first current collector and second current collector;

FIG. 61 is a cross-sectional view illustrating an example of acombination of the first current collector and second current collector;

FIG. 62 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 63 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 64 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 65 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIG. 66 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment;

FIGS. 67A through 67J are x-y views (plan views) illustrating an exampleof a laminating step and the insulating portion folding steps;

FIGS. 68A and 68B are x-y views (plan views) illustrating an example oflaminating the first current collector and second current collector;

FIG. 69 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment; and

FIG. 70 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

DETAILED DESCRIPTION

Embodiments will be described below with reference to the drawings.

First Embodiment

FIG. 1 is a perspective view illustrating a schematic configuration of abattery 1000 according to a first embodiment.

FIG. 2 is a diagram illustrating a schematic configuration of thebattery 1000 according to the first embodiment.

Indicated by (a) in FIG. 2 is an x-z view (cross-sectional view takenalong 2A in FIG. 2) illustrating the schematic configuration of thebattery 1000 according to the first embodiment.

Indicated by (b) in FIG. 28 is an x-y view (cross-sectional view takenalong 2B in FIG. 2) illustrating the schematic configuration of thebattery 1000 according to the first embodiment.

The battery 1000 according to the first embodiment includes a firstcurrent collector 100, a first electrode layer 311, and a first counterelectrode layer 312.

The first counter electrode layer 312 is a counter electrode of thefirst electrode layer 311.

The first current collector 100 has a first electroconductive portion111, a second electroconductive portion 112, and a first insulatingportion 121.

The first electrode layer 311 is disposed in contact with the firstelectroconductive portion 111.

The first counter electrode layer 312 is disposed in contact with thesecond electroconductive portion 112.

The first insulating portion 121 is a member linking the firstelectroconductive portion 111 and second electroconductive portion 112.

The first current collector 100 is folded at the first insulatingportion 121, whereby the first electrode layer 311 and first counterelectrode layer 312 are positioned facing each other.

According to the above configuration, the bonding strength betweencomponents of the battery can be improved. That is to say, the firstelectrode layer 311 and first counter electrode layer 312 can berespectively disposed to the first electroconductive portion 111 andsecond electroconductive portion 112 that are linked to each other bythe first insulating portion 121. Accordingly, the positionalrelationship between the first electrode layer 311 disposed on the firstelectroconductive portion 111 and the first counter electrode layer 312disposed on the second electroconductive portion 112 can be stronglymaintained by the first insulating portion 121 (in other words, by thefirst current collector 100 that is one component). Accordingly, thelayers (or cells) making up the battery can be prevented from exhibitingpositional shifting or separation due to shock, vibration, and so forth,when manufacturing the battery or using the battery, for example. Thatis to say, the strength of bonding of the layers (e.g., the firstelectrode layer 311 and first counter electrode layer 312) making up thebattery can be improved by the first current collector 100. Thus,reliability of the battery can be improved.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the first insulating portion 121 issituated can be covered by the first insulating portion 121.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the first insulating portion 121 is situated, can beprevented by the first insulating portion 121. Thus, short-circuitingamong batteries can be suppressed. Also, partial destruction of the sideface of the battery by contact between the battery and members that mayexist outside of the battery can be suppressed. Even if a part ofbattery components (e.g., electrode material included in the firstelectrode layer 311, counter electrode material included in the firstcounter electrode layer 312, and so forth) of the battery falls loose,the fallen component can be suppressed by the first insulating portion121 from moving to another cell portion within the battery or to theoutside of the battery, due to part of the side face of the batterybeing covered by the first insulating portion 121. Accordingly,short-circuiting within the battery due to fallen components of thebattery can be suppressed. This enables the reliability of the batteryto be further improved.

Note that the battery 1000 according to the first embodiment may furtherinclude a first solid electrolyte layer 313, as illustrated in FIG. 2.

The first solid electrolyte layer 313 is situated between the firstelectrode layer 311 and the first counter electrode layer 312.

According to the above configuration, one solid battery cell (firstpower-generating element 310) can be configured from the first electrodelayer 311, first counter electrode layer 312, and first solidelectrolyte layer 313.

Note that the first solid electrolyte layer 313 may be disposed incontact with the first electroconductive portion 111 and secondelectroconductive portion 112 in the battery 1000 according to the firstembodiment.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between the first electroconductive portion 111 andsecond electroconductive portion 112 can be improved by the first solidelectrolyte layer 313. Accordingly, the first electrode layer 312 can besuppressed from peeling loose from the second electroconductive portion112. Further, the first electrode layer 311 can be suppressed frompeeling loose from the first electroconductive portion 111. Thus, thelayers of the first power-generating element 310 can be prevented fromexhibiting positional shifting or separation due to shock, vibration,and so forth, when manufacturing the battery or using the battery, forexample. Thus, reliability of the battery can be improved even further.

The first electroconductive portion 111 and second electroconductiveportion 112 are members having electroconductivity. The firstelectroconductive portion 111 and second electroconductive portion 112may be thin films having electroconductivity, for example. Examples ofmaterial from which the first electroconductive portion 111 and secondelectroconductive portion 112 are formed include metal (stainless steel(SUS), aluminum (Al), copper (Cu), and so forth), for example. Thematerial of a principal face of the first electroconductive portion 111and second electroconductive portion 112 on which electrode layers areformed may be a different material from that of a principal face wherecounter electrode layers are formed. That is to say, amulti-layer-structure metal foil may be used for the firstelectroconductive portion 111 and second electroconductive portion 112.Also, a current collector layer (e.g., a layer including anelectroconductive material) may be provided to portions coming intocontact with an electrode layer or counter electrode layer. Thethicknesses of the first electroconductive portion 111 and secondelectroconductive portion 112 may be 5 to 100 μm, for example.

The first power-generating element 310 is a power-generating unit havingcharging and discharging properties (e.g., a secondary battery), forexample. The first power-generating element 310 may be a battery cell,for example.

Note that the first power-generating element 310 may have a solidelectrolyte layer. That is to say, the first power-generating element310 may be a fully-solid battery.

The first electrode layer 311 is a layer including electrode material(e.g., active material).

The first counter electrode layer 312 is a layer including counterelectrode material (e.g., active material). Counter electrode materialis material making up counter electrodes to the electrode material.

The first electrode layer 311 and first counter electrode layer 312 maybe each formed over ranges narrower than the first electroconductiveportion 111 and second electroconductive portion 112, as illustrated inFIG. 2.

The first solid electrolyte layer 313 is a solid electrolyte layerincluding a solid electrolyte.

The first solid electrolyte layer 313 may be disposed over a greaterarea than that of the first electrode layer 311 and first counterelectrode layer 312, as illustrated in FIG. 2. That is to say, the firstsolid electrolyte layer 313 may be disposed in a manner covering thefirst electrode layer 311 and first counter electrode layer 312.Accordingly, short-circuiting of the first electrode layer 311 and firstcounter electrode layer 312 due to direct contact can be prevented.

The first solid electrolyte layer 313 may be disposed in a range that isnarrower than the first electroconductive portion 111 and secondelectroconductive portion 112, as illustrated in FIG. 2, Alternatively,the formation range of the first solid electrolyte layer 313 may be thesame range as the first electroconductive portion 111 and secondelectroconductive portion 112.

Note that the first electrode layer 311 may be a negative activematerial layer. The electrode material in this case is a negative activematerial. The first electroconductive portion 111 is a negative currentcollector. The first counter electrode layer 312 is a positive activematerial layer. The counter electrode material is a positive activematerial. The second electroconductive portion 112 is a positive currentcollector.

Alternatively, first electrode layer 311 may be a positive activematerial layer. The electrode material in this case is a positive activematerial. The first electroconductive portion 111 is a positive currentcollector. The first counter electrode layer 312 is a negative activematerial layer. The counter electrode material is a negative activematerial. The second electroconductive portion 112 is a negative currentcollector.

Known positive active materials (e.g., lithium cobalt oxide, lithiumoxonitrate (LiNO), etc.) may be used as positive active materialincluded in the positive active material layers. Various materialscapable of ion detachment and insertion such as lithium (Li) andmagnesium (Mg) may be used as ingredients of the positive activematerial.

Known solid electrolytes (e.g., inorganic solid electrolytes, etc.) maybe used as materials included in the positive active material layers.Sulfide solid electrolytes, oxide solid electrolytes, or the like, maybe used as an inorganic solid electrolyte. As an example of a sulfidesolid electrolyte, a mixture of lithium sulfide and phosphoruspentasulfide (Li₂S: P₂S₅) may be used. The surface of the positiveactive material may be coated with a solid electrolyte. Conductors(e.g., acetylene black, etc.), adhesive binders (e.g., polyvinylidenedifluoride, etc.) may be used as materials included in the positiveactive material layers.

A positive active material layer may be fabricated by a paste-likecoating agent, in which these materials included in the positive activematerial layers have been kneaded with a solvent, being coated upon theface of a positive current collector, and dried. Pressing may beperformed after drying, in order to improve the density of the positiveactive material layer. The thickness of the positive active materiallayer fabricated in this way is 5 to 300 μm, for example.

Metal foil (e.g., SUS foil or Al foil) or the like may be used as thepositive current collector.

Known negative active materials (e.g., graphite, etc.) may be used asnegative active material included in the negative active materiallayers. Various materials capable of ion detachment and insertion suchas lithium (Li) and magnesium (Mg) may be used as ingredients of thepositive active material.

Known solid electrolytes (e.g., inorganic solid electrolytes, etc.) maybe used as materials included in the negative active material layers.Sulfide solid electrolytes, oxide solid electrolytes, or the like, maybe used as an inorganic solid electrolyte. As an example of a sulfidesolid electrolyte, a mixture of Li₂S P₂S₅ may be used. Conductors (e.g.,acetylene black, etc.), adhesive binders (e.g., polyvinylidenedifluoride, etc.) may be used as materials included in the negativeactive material layers.

A negative active material layer may be fabricated by a paste-likecoating agent, in which these materials included in the negative activematerial layers have been kneaded with a solvent, being coated upon theface of a negative current collector, and dried. Pressing of thenegative polarity plate may be performed in order to improve the densityof the negative active material layer. The thickness of the negativeactive material layer fabricated in this way is 5 to 300 μm, forexample.

Metal foil (e.g., SUS foil or Cu foil) or the like may be used as thenegative current collector.

The range of formation of the positive active material layers and thenegative active material layers may be the same. Alternatively, therange of formation of the negative active material layers may be largerthan the range of formation of the positive active material layers.According to this, deterioration in reliability of the battery due tolithium deposition (or magnesium deposition), for example, can beprevented.

Known solid electrolytes (e.g., inorganic solid electrolytes, etc.) maybe used as solid electrolytes included in the solid electrolyte layers.Sulfide solid electrolytes, oxide solid electrolytes, or the like, maybe used as an inorganic solid electrolyte. As an example of a sulfidesolid electrolyte, a mixture of Li₂S: P₂S₅ may be used.

Adhesive binders (e.g., polyvinylidene difluoride, etc.) may be used asmaterials included in the solid electrolyte layers.

A solid electrolyte layer may be fabricated by a paste-like coatingagent, in which these included materials have been kneaded with asolvent, being coated upon the face of a positive current collector ornegative current collector, and dried.

The first insulating portion 121 is a member formed of insulatingmaterial (i.e., material having no electroconductivity or sufficientlylow electroconductivity). Examples of the material of the firstinsulating portion 121 includes resin or the like. The first insulatingportion 121 may be a resin film (or mesh), for example. The thickness ofthe first insulating portion 121 may be 5 to 100 μm, for example.

The first insulating portion 121 is linked to the firstelectroconductive portion 111 and second electroconductive portion 112.That is to say, one end of the first insulating portion 121 is connected(e.g., bonded) to the first electroconductive portion 111 (e.g., an endof the first electroconductive portion 111). Another end of the firstinsulating portion 121 is further connected (e.g., bonded) to the secondelectroconductive portion 112 (e.g., an end portion of the secondelectroconductive portion 112).

The first current collector 100 may be fabricated by the firstelectroconductive portion 111, second electroconductive portion 112, andfirst insulating portion 121, that have each been individually prepared,being combined (i.e., connected to each other.)

FIG. 3 is a diagram illustrating a schematic configuration of an exampleof the first current collector 100.

Indicated by (a) in FIG. 3 is an x-z view (cross-sectional view takenalong 3A in FIG. 3) illustrating a schematic configuration of an exampleof the first current collector 100.

Indicated by (b) FIG. 3 is an x-y view (plan view) illustrating aschematic configuration of an example of the first current collector100.

At least one (or both) of the first electroconductive portion 111 andsecond electroconductive portion 112 may be connected to the firstinsulating portion 121 by abutting, as illustrated in FIG. 3. That is tosay, the side faces of the first electroconductive portion 111 and firstinsulating portion 121 may be connected (e.g., bonded) to the firstinsulating portion 121.

According to this configuration, steps on the first current collector100 can be reduced in size. Accordingly, the form after winding up whenmanufacturing the battery can be improved, for example. Thus, a batterywith higher energy density can be realized.

FIG. 4 is a diagram illustrating a schematic configuration of an exampleof the first current collector 100.

Indicated by (a) in FIG. 4 is an x-z view (cross-sectional view takenalong 4A in FIG. 4) illustrating a schematic configuration of an exampleof the first current collector 100.

Indicated by (b) in FIG. 4 is an x-y view (plan view) illustrating aschematic configuration of an example of the first current collector100.

At least one (or both) of the of the ends first electroconductiveportion 111 and second electroconductive portion 112 (S1 and S2illustrated in (b) in FIG. 4) may be connected to the first insulatingportion 121 by overlapping, as illustrated in FIG. 4.

According to this configuration, the bonding area can be increased.Thus, the bonding strength can be improved.

FIG. 5 is a diagram illustrating a schematic configuration of an exampleof the first current collector 100.

Indicated by (a) in FIG. 5 is an x-z view (cross-sectional view takenalong 5A in FIG. 5) illustrating a schematic configuration of an exampleof the first current collector 100.

Indicated by (b) in FIG. 5 is an x-y view (plan view) illustrating aschematic configuration of an example of the first current collector100.

At least one (or both) of the first electroconductive portion 111 andsecond electroconductive portion 112 may be connected to the firstinsulating portion 121 by fitting, as illustrated in FIG. 5. That is tosay, the first electroconductive portion 111 and secondelectroconductive portion 112 may each be embedded into opening portionsformed in the first insulating portion 121. The first electroconductiveportion 111 and second electroconductive portion 112 may thus be fixedto the opening portions of the first insulating portion 121.

According to this configuration, steps on the first current collector100 can be reduced in size. Accordingly, the form after winding up whenmanufacturing the battery can be improved, for example. Thus, a batterywith higher energy density can be realized. Further, the firstinsulating portion 121 can be continuously formed over the entirety ofthe first current collector 100. Thus, the tensile strength of the firstcurrent collector 100 can be improved.

Note that the first insulating portion 121 may be a portion formed by apart (electroconductive part) of the first current collector 100 beingmade non-electroconductive (e.g., electroconductivity being sufficientlyreduced) by chemical processing (oxidization, etc.), for example.

FIG. 6 is a perspective view illustrating a schematic configuration of abattery 1100 according to the first embodiment.

FIG. 7 is an x-z diagram (cross-sectional view) illustrating a schematicconfiguration of the battery 1100 according to the first embodiment.

The battery 1100 according to the first embodiment further has, inaddition to the configuration of the above-described battery 1000according to the first embodiment, the following configuration.

That is to say, the battery 1100 according to the first embodimentfurther includes a second electrode layer 321 and a second counterelectrode layer 322.

The second counter electrode layer 322 is a counter electrode of thefirst electrode layer 311 and second electrode layer 321.

The first current collector 100 includes a second insulating portion 122and a third electroconductive portion 113.

The second electrode layer 321 is disposed in contact with the secondelectroconductive portion 112.

The second counter electrode layer 322 is disposed in contact with thethird electroconductive portion 113.

The second insulating portion 122 is a member linking the secondelectroconductive portion 112 and third electroconductive portion 113.

The first current collector 100 is folded at the second insulatingportion 122, whereby the second electrode layer 321 and second counterelectrode layer 322 are positioned facing each other.

According to the above configuration, the bonding strength betweencomponents of the battery can be improved. That is to say, the secondelectrode layer 321 and second counter electrode layer 322 can berespectively disposed to the second electroconductive portion 112 andthird electroconductive portion 113 that are linked to each other by thesecond insulating portion 122. Accordingly, the positional relationshipbetween the second electrode layer 321 disposed on the secondelectroconductive portion 112 and the second counter electrode layer 322disposed on the third electroconductive portion 113 can be stronglymaintained by the second insulating portion 122 (in other words, by thefirst current collector 100 that is one component). Accordingly, thelayers (e.g., second electrode layer 321 and second counter electrodelayer 322) making up the battery can be prevented from exhibitingpositional shifting or separation due to shock, vibration, and so forth,when manufacturing the battery or using the battery, for example.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100. That is to say, apower-generating element (first power-generating element 310) includingthe first electrode layer 311 and first counter electrode layer 312, anda power-generating element (second power-generating element 320)including the second electrode layer 321 and second counter electrodelayer 322, can be laminated by serial connection via the first currentcollector 100 (i.e., the second electroconductive portion 112 of thefirst current collector 100). Accordingly, the positional relationshipbetween the components of the first power-generating element 310 and thecomponents of the second power-generating element 320 can be stronglymaintained by the first insulating portion 121 and second insulatingportion 122 (in other words, by the first current collector 100 that isone component). Accordingly, the power-generating elements (e.g., thefirst power-generating element 310 and second power-generating element320) making up the battery can be prevented from exhibiting positionalshifting or separation due to shock, vibration, and so forth, whenmanufacturing the battery or using the battery, for example. Thus, thereliability of the battery can be improved while raising the batteryvoltage by the serial connection of the first power-generating element310 and second power-generating element 320.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the second insulating portion 122 issituated can be covered by the second insulating portion 122.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the second insulating portion 122 is situated, can beprevented by the second insulating portion 122. Thus, short-circuitingdue to contact among batteries can be suppressed. Also, partialdestruction of the side face of the battery by contact between thebattery and members that may exist outside of the battery can besuppressed. Even if a part of components (e.g., electrode materialincluded in the second electrode layer 321, counter electrode materialincluded in the second counter electrode layer 322, and so forth) of thebattery falls loose, the fallen component can be suppressed by thesecond insulating portion 122 from moving to another cell portion (e.g.,the first power-generating element 310, etc.) within the battery or tothe outside of the battery, due to part of the side face of the batterybeing covered by the second insulating portion 122. Accordingly,short-circuiting within the battery due to fallen components of thebattery can be suppressed. This enables the reliability of the batteryto be further improved.

Note that the battery 1100 according to the first embodiment may furtherinclude a second solid electrolyte layer 323, as illustrated in FIG. 7.

The second solid electrolyte layer 323 is situated between the secondelectrode layer 321 and second counter electrode layer 322.

According to the above configuration, one solid battery cell (secondpower-generating element 320) can be configured from the secondelectrode layer 321, second counter electrode layer 322, and secondsolid electrolyte layer 323.

Note that the second solid electrolyte layer 323 may be disposed incontact with the second electroconductive portion 112 and thirdelectroconductive portion 113 in the battery 1100 according to the firstembodiment.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between the second electroconductive portion 112 andthird electroconductive portion 113 can be improved by the second solidelectrolyte layer 323. Accordingly, the second counter electrode layer322 can be suppressed from peeling loose from the thirdelectroconductive portion 113. Further, the second electrode layer 321can be suppressed from peeling loose from the second electroconductiveportion 112. Thus, the layers making up the second power-generatingelement 320 can be prevented from exhibiting positional shifting orseparation due to shock, vibration, and so forth, when manufacturing thebattery or using the battery, for example. Thus, reliability of thebattery can be improved even further.

The second electrode layer 321 and second counter electrode layer 322may be each formed over ranges narrower than the secondelectroconductive portion 112 and third electroconductive portion 113,as illustrated in FIG. 7.

The second solid electrolyte layer 323 may be disposed over a greaterarea than that of the second electrode layer 321 and second counterelectrode layer 322, as illustrated in FIG. 7. That is to say, thesecond solid electrolyte layer 323 may be disposed in a manner coveringthe second electrode layer 321 and second counter electrode layer 322.Accordingly, short-circuiting of the second electrode layer 321 andsecond counter electrode layer 322 due to direct contact can beprevented.

The second solid electrolyte layer 323 may be disposed in a range thatis narrower than the second electroconductive portion 112 and thirdelectroconductive portion 113, as illustrated in FIG. 7. Alternatively,the formation range of the second solid electrolyte layer 323 may be thesame range as the second electroconductive portion 112 and thirdelectroconductive portion 113.

The second insulating portion 122 is linked to the secondelectroconductive portion 112 and third electroconductive portion 113.That is to say, one end of the second insulating portion 122 isconnected (e.g., bonded) to the second electroconductive portion 112(e.g., an end of the second electroconductive portion 112). Another endof the second insulating portion 122 is further connected (e.g., bonded)to the third electroconductive portion 113 (e.g., an end portion of thethird electroconductive portion 113).

Note that the method of connecting at least one (or both) of the secondelectroconductive portion 112 and the third electroconductive portion113 to the second insulating portion 122 may be different from themethod of connecting at least one (or both) of the firstelectroconductive portion 111 and second electroconductive portion 112to the first insulating portion 121, or may be the same.

Note that the end of the second electroconductive portion 112 (i.e., ina case where the second electroconductive portion 112 is rectangular,one side of the rectangle) to which the second insulating portion 122 isconnected may be different from the end of the second electroconductiveportion 112 to which the first insulating portion 121 is connected, ormay be the same. That is to say, the end of the second electroconductiveportion 112 to which the second insulating portion 122 is connected maybe an end situated across from the end of the second electroconductiveportion 112 to which the first insulating portion 121 is connected, asillustrated in FIGS. 6 and 7. Alternatively, the end of the secondelectroconductive portion 112 to which the second insulating portion 122is connected may be an end adjacent to the end of the secondelectroconductive portion 112 to which the first insulating portion 121is connected.

Note that the first electrode layer 311 and second electrode layer 321may be negative active material layers. The electrode material in thiscase is a negative active material. The first electroconductive portion111 is a negative current collector. The first counter electrode layer312 and second counter electrode layer 322 are positive active materiallayers. The counter electrode material is a positive active material.The second electroconductive portion 112 is a bipolar current collector(i.e., a current collector having a principal face having a positivelayer and a principal face having a negative layer). The thirdelectroconductive portion 113 is a positive current collector.

Alternatively, the first electrode layer 311 and second electrode layer321 may be positive active material layers. The electrode material inthis case is a positive active material. The first electroconductiveportion 111 is a positive current collector. The first counter electrodelayer 312 and second counter electrode layer 322 are negative activematerial layers. The counter electrode material is a negative activematerial. The second electroconductive portion 112 is a bipolar currentcollector. The third electroconductive portion 113 is a negative currentcollector.

FIG. 8 is a perspective view illustrating a schematic configuration of abattery 1200 according to the first embodiment.

FIG. 9 is an x-z diagram (cross-sectional view) illustrating a schematicconfiguration of the battery 1200 according to the first embodiment.

The battery 1200 according to the first embodiment has the followingconfiguration in addition to the configuration of the above-describedbattery 1100 according to the first embodiment.

That is to say, the battery 1200 according to the first embodimentfurther includes a third electrode layer 331 and a third counterelectrode layer 332.

The third counter electrode layer 332 is a counter electrode of thefirst electrode layer 311, second electrode layer 321, and thirdelectrode layer 331.

The first current collector 100 includes a third insulating portion 123and a fourth electroconductive portion 114.

The third electrode layer 331 is disposed in contact with the thirdelectroconductive portion 113.

The third counter electrode layer 332 is disposed in contact with thefourth electroconductive portion 114.

The third insulating portion 123 is a member linking the thirdelectroconductive portion 113 and the fourth electroconductive portion114.

The first current collector 100 is folded at the third insulatingportion 123, whereby the third electrode layer 331 and third counterelectrode layer 332 are positioned facing each other.

According to the above configuration, the bonding strength amongcomponent members of the battery can be further improved. That is tosay, the third electrode layer 331 and third counter electrode layer 332can be respectively disposed at the third electroconductive portion 113and fourth electroconductive portion 114 that are linked with each otherby the third insulating portion 123. Accordingly, the positionalrelationship between the third electrode layer 331 disposed on the thirdelectroconductive portion 113 and the third counter electrode layer 332disposed on the fourth electroconductive portion 114 can be stronglymaintained by the third insulating portion 123 (in other words, by thefirst current collector 100 that is one component). Accordingly, thelayers (e.g., the third electrode layer 331 and third counter electrodelayer 332) making up the battery can be prevented from exhibitingpositional shifting or separation due to shock, vibration, and so forth,when manufacturing the battery or using the battery, for example.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100. That is to say, apower-generating element (second power-generating element 320) includingthe second electrode layer 321 and second counter electrode layer 322,and a power-generating element (third power-generating element 330)including the third electrode layer 331 and third counter electrodelayer 332, can be laminated by serial connection via the first currentcollector 100 (i.e., the third electroconductive portion 113 of thefirst current collector 100). Accordingly, the positional relationshipbetween the components of the second power-generating element 320 andthe components of the third power-generating element 330 can be stronglymaintained by the second insulating portion 122 and third insulatingportion 123 (in other words, by the first current collector 100 that isone component). Accordingly, the power-generating elements (e.g., thesecond power-generating element 320 and third power-generating element330) making up the battery can be prevented from exhibiting positionalshifting or separation due to shock, vibration, and so forth, whenmanufacturing the battery or using the battery, for example. Thus, thereliability of the battery can be improved while raising the batteryvoltage by the serial connection of the second power-generating element320 and third power-generating element 330.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the third insulating portion 123 issituated can be covered by the third insulating portion 123.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the third insulating portion 123 is situated, can beprevented by the third insulating portion 123. Thus, short-circuitingamong batteries due to contact can be suppressed. Also, partialdestruction of the side face of the battery by contact between thebattery and members that may exist outside of the battery can besuppressed. Even if a part of battery components (e.g., electrodematerial included in the third electrode layer 331, counter electrodematerial included in the third counter electrode layer 332, and soforth) of the battery falls loose, the fallen component can besuppressed by the third insulating portion 123 from moving to anothercell portion (e.g., the second power-generating element 320, etc.)within the battery or to the outside of the battery, due to part of theside face of the battery being covered by the third insulating portion123. Accordingly, short-circuiting within the battery due to fallencomponents of the battery can be suppressed. This enables thereliability of the battery to be further improved.

Note that the battery 1200 according to the first embodiment may furtherinclude a third solid electrolyte layer 333, as illustrated in FIG. 9.

The third solid electrolyte layer 333 is situated between the thirdelectrode layer 331 and third counter electrode layer 332.

According to the above configuration, one solid battery cell (thirdpower-generating element 330) can be configured from the third electrodelayer 331 third counter electrode layer 332, and third solid electrolytelayer 333.

Note that the third solid electrolyte layer 333 may be disposed incontact with the third electroconductive portion 113 and fourthelectroconductive portion 114 in the battery 1200 according to the firstembodiment.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between the third electroconductive portion 113 andfourth electroconductive portion 114 can be improved by the third solidelectrolyte layer 333. Accordingly, the third counter electrode layer332 can be suppressed from peeling loose from the fourthelectroconductive portion 114. Further, the third electrode layer 331can be suppressed from peeling loose from the third electroconductiveportion 113. Thus, the layers making up the third power-generatingelement 330 can be prevented from exhibiting positional shifting orseparation due to shock, vibration, and so forth, when manufacturing thebattery or using the battery, for example. Thus, reliability of thebattery can be improved even further.

Note that the third electrode layer 331 and third counter electrodelayer 332 may each be formed in a narrower range than the thirdelectroconductive portion 113 and fourth electroconductive portion 114,as illustrated in FIG. 9.

Also, the third solid electrolyte layer 333 may be disposed over agreater area than that of the third electrode layer 331 and thirdcounter electrode layer 332, as illustrated in FIG. 9. That is to say,the third solid electrolyte layer 333 may be disposed in a form coveringthe third electrode layer 331 and third counter electrode layer 332.Thus, short-circuiting of the third electrode layer 331 and thirdcounter electrode layer 332 due to direct contact can be prevented.

Also, the third solid electrolyte layer 333 may be disposed over anarrower range than the third electroconductive portion 113 and fourthelectroconductive portion 114, as illustrated in FIG. 9. Alternatively,the range of formation of the third solid electrolyte layer 333 may bethe same range as that of the third electroconductive portion 113 andfourth electroconductive portion 114.

The third insulating portion 123 is linked to the thirdelectroconductive portion 113 and fourth electroconductive portion 114.That is to say, one end of the third insulating portion 123 is connected(e.g., bonded) to the third electroconductive portion 113 (e.g., an endof the third electroconductive portion 113). Another end of the thirdinsulating portion 123 is further connected (e.g., bonded) to the fourthelectroconductive portion 114 (e.g., an end of the fourthelectroconductive portion 114).

A connection method of at least one (e.g., both) of the thirdelectroconductive portion 113 and fourth electroconductive portion 114to the third insulating portion 123 may be different from the connectionmethod of at least one (e.g., both) of the second electroconductiveportion 112 and third electroconductive portion 113 to the secondinsulating portion 122, or may be the same.

Note that the end of the third electroconductive portion 113 (i.e., in acase where the third electroconductive portion 113 is rectangular, oneside of the rectangle) to which the third insulating portion 123 isconnected may be the same as the end of the third electroconductiveportion 113 to which the second insulating portion 122 is connected, ormay be different. That is to say, the end of the third electroconductiveportion 113 to which the third insulating portion 123 is connected maybe an end situated across from the end of the third electroconductiveportion 113 to which the first insulating portion 121 is connected, asillustrated in FIGS. 8 and 9. Alternatively, the end of the thirdelectroconductive portion 113 to which the third insulating portion 123is connected may be an end adjacent to the end of the thirdelectroconductive portion 113 to which the second insulating portion 122is connected.

Note that the first electrode layer 311, second electrode layer 321, andthird electrode layer 331 may be negative active material layers. Theelectrode material here is a negative active material. The firstelectroconductive portion 111 is a negative current collector. The firstcounter electrode layer 312, second counter electrode layer 322, andthird counter electrode layer 332 are positive active material layers.The counter electrode material is a positive active material. The secondelectroconductive portion 112 and third electroconductive portion 113are bipolar current collectors. The fourth electroconductive portion 114is a positive current collector.

Alternatively, the first electrode layer 311, second electrode layer321, and third electrode layer 331 may be positive active materiallayers. The electrode material here is a positive active material. Thefirst electroconductive portion 111 is a positive current collector. Thefirst counter electrode layer 312, second counter electrode layer 322,and third counter electrode layer 332 are negative active materiallayers. The counter electrode material is a negative active material.The second electroconductive portion 112 and third electroconductiveportion 113 are bipolar current collectors. The fourth electroconductiveportion 114 is a negative current collector.

Note that the third electroconductive portion 113 and fourthelectroconductive portion 114 are members having electroconductivity.The configurations of the first electroconductive portion 111, secondelectroconductive portion 112, third electroconductive portion 113, andfourth electroconductive portion 114 (e.g., thicknesses, area, shape,materials included, etc.) may be the same as each other, or may bedifferent.

The second insulating portion 122 and third insulating portion 123 aremembers formed of insulating material (i.e., material having noelectroconductivity or sufficiently low electroconductivity).Configurations of the first insulating portion 121, second insulatingportion 122, and third insulating portion 123 (e.g., thicknesses, area,shape, materials included, etc.) may be the same as each other, or maybe different.

The second power-generating element 320 and third power-generatingelement 330 are power-generating units having charging and dischargingproperties (e.g., secondary batteries), for example. The secondpower-generating element 320 and third power-generating element 330 maybe a battery cell, or a fully-solid battery, for example. Configurationsof the first power-generating element 310, second power-generatingelement 320, and third power-generating element 330 (e.g., thicknessesof the layers, area, shape, materials included, etc.) may be the same aseach other, or may be different.

The second electrode layer 321 and third electrode layer 331 are layersincluding electrode material (e.g., active material), Configurations ofthe first electrode layer 311, second electrode layer 321, and thirdelectrode layer 331 (e.g., thicknesses, area, shape, materials included,etc.) may be the same as each other, or may be different.

The second counter electrode layer 322 third counter electrode layer 332are layers including counter electrode material (e.g., active material).Counter electrode material is material making up counter electrodes tothe electrode material. Configurations of the first counter electrodelayer 312, second counter electrode layer 322, and third counterelectrode layer 332 (e.g., thicknesses of the layers, area, shape,materials included, etc.) may be the same as each other, or may bedifferent.

The second solid electrolyte layer 323 and third solid electrolyte layer333 are solid electrolyte layers including a solid electrolyte.Configurations of the first solid electrolyte layer 313, second solidelectrolyte layer 323, and third solid electrolyte layer 333 (e.g.,thicknesses of the layers, area, shape, materials included, etc.) may bethe same as each other, or may be different.

FIG. 10 is an x-z diagram (cross-sectional view) illustrating aschematic configuration of a battery 1300 according to the firstembodiment.

FIG. 11 is an x-z diagram (cross-sectional view) illustrating aschematic configuration of a battery 1400 according to the firstembodiment.

FIG. 12 is an x-z diagram (cross-sectional view) illustrating aschematic configuration of a battery 1500 according to the firstembodiment.

The first insulating portion 121 may have a first overhang portion 121a.

The first overhang portion 121 a is a portion that overhangs from thesecond electroconductive portion 112 toward the side where the secondelectrode layer 321 is disposed (part of the first insulating portion121), as illustrated in FIGS. 10 and 11.

According to the above configuration, the side faces of componentmembers situated toward the side where the second electrode layer 321 isdisposed from the second electroconductive portion 112 (e.g., secondelectrode layer 321, second counter electrode layer 322, second solidelectrolyte layer 323, etc.) can be covered by the first overhangportion 121 a of the first insulating portion 121, while covering theside faces of component members interposed between the firstelectroconductive portion 111 and second electroconductive portion 112(e.g., first electrode layer 311, first counter electrode layer 312,first solid electrolyte layer 313, etc.) by the first insulating portion121. Accordingly, mutual contact between members that may exist outsideof the battery (e.g., another battery, etc.), and the side faces ofcomponent members interposed between the first electroconductive portion111 and second electroconductive portion 112, and component memberssituated toward the side where the second electrode layer 321 isdisposed from the second electroconductive portion 112, can be preventedby the first insulating portion 121.

The second insulating portion 122 may have at least one of a secondoverhang portion 122 a and a second overhang portion 122 b.

The second overhang portion 122 a is a portion that overhangs from thesecond electroconductive portion 112 toward the side where the firstcounter electrode 312 is disposed (part of the second insulating portion122), as illustrated in FIGS. 10 and 12.

According to the above configuration, the side faces of componentmembers situated toward the side where the first counter electrode layer312 is disposed from the second electroconductive portion 112 (e.g.,first electrode layer 311, first counter electrode layer 312, firstsolid electrolyte layer 313, etc.) can be covered by the second overhangportion 122 a of the second insulating portion 122, while covering theside faces of component members interposed between the secondelectroconductive portion 112 and third electroconductive portion 113(e.g., second electrode layer 321, second counter electrode layer 322,second solid electrolyte layer 323, etc.) by the second insulatingportion 122. Accordingly, mutual contact between members that may existoutside of the battery (e.g., another battery, etc.), and the side facesof component members interposed between the second electroconductiveportion 112 and third electroconductive portion 113, and componentmembers situated toward the side where the first counter electrode layer312 is disposed from the second electroconductive portion 112, can beprevented by the second insulating portion 122.

The second overhang portion 122 b is a portion that overhangs from thethird electroconductive portion 113 toward the side where the thirdelectrode layer 331 is disposed (part of the second insulating portion122), as illustrated in FIGS. 10 and 11.

According to the above configuration, the side faces of componentmembers situated toward the side where the third electrode layer 331 isdisposed from the third electroconductive portion 113 (e.g., thirdelectrode layer 331, third counter electrode layer 332, third solidelectrolyte layer 333, etc.) can be covered by the second overhangportion 122 b of the second insulating portion 122, while covering theside faces of component members interposed between the secondelectroconductive portion 112 and third electroconductive portion 113(e.g., second electrode layer 321, second counter electrode layer 322,second solid electrolyte layer 323, etc.) by the second insulatingportion 122. Accordingly, mutual contact between members that may existoutside of the battery (e.g., another battery, etc.), and the side facesof component members situated toward the side where the third electrodelayer 331 is disposed from the third electroconductive portion 113, canbe prevented by the second insulating portion 122.

The third insulating portion 123 may have a third overhang portion 123a.

The third overhang portion 123 a is a portion that overhangs from thethird electroconductive portion 113 toward the side where the secondcounter electrode layer 322 is disposed (part of the third insulatingportion 123), as illustrated in FIGS. 10 and 12.

According to the above configuration, the side faces of componentmembers situated toward the side where the second counter electrodelayer 322 is disposed from the third electroconductive portion 113(e.g., second electrode layer 321, second counter electrode layer 322,second solid electrolyte layer 323, etc.) can be covered by the thirdoverhang portion 123 a of the third insulating portion 123, whilecovering the side faces of component members interposed between thethird electroconductive portion 113 and fourth electroconductive portion114 (e.g., third electrode layer 331, third counter electrode layer 332,third solid electrolyte layer 333, etc.) by the third insulating portion123. Accordingly, mutual contact between members that may exist outsideof the battery (e.g., another battery, etc.), and the side faces ofcomponent members interposed between the third electroconductive portion113 and fourth electroconductive portion 114, and component memberssituated toward the side where the second counter electrode layer 322 isdisposed from the third electroconductive portion 113, can be preventedby the third insulating portion 123.

The first insulating portion 121 and third insulating portion 123 maycome in contact with each other, as illustrated in FIGS. 10 through 12.

According to the above configuration, the side faces of componentmembers interposed between the second electroconductive portion 112 andthird electroconductive portion 113 (e.g., second electrode layer 321,second counter electrode layer 322, second solid electrolyte layer 323,etc.) can be covered by at least one of the first insulating portion 121and third insulating portion 123, while covering the side faces ofcomponent members interposed between the first electroconductive portion111 and second electroconductive portion 112 (e.g., first electrodelayer 311, first counter electrode layer 312, first solid electrolytelayer 313, etc.) by the first insulating portion 121, and also whilecovering the side faces of component members interposed between thethird electroconductive portion 113 and fourth electroconductive portion114 (e.g., third electrode layer 331, third counter electrode layer 332,third solid electrolyte layer 333, etc.) by the third insulating portion123. In other words, of the side faces of component members interposedbetween the second electroconductive portion 112 and thirdelectroconductive portion 113, side faces different from the side facescovered by the second insulating portion 122, can be covered by at leastone of the first insulating portion 121 and third insulating portion123. Accordingly, mutual contact between members that may exist outsideof the battery (e.g., another battery, etc.), and the side faces ofcomponent members interposed between the first electroconductive portion111 and the fourth electroconductive portion 114 can be prevented by thefirst insulating portion 121 and third insulating portion 123. Even if apart of components (e.g., electrode material included in the secondelectrode layer 321, counter electrode material included in the secondcounter electrode layer 322, and so forth) of the battery falls loose,the fallen component can be suppressed by the second electroconductiveportion 112 and third insulating portion 123 from moving to another cellportion (e.g., first power-generating element 310, thirdpower-generating element 330, etc.) within the battery or to the outsideof the battery, due to the first insulating portion 121 and thirdinsulating portion 123. Accordingly, short-circuiting within the batterydue to fallen components of the battery can be suppressed. This enablesthe reliability of the battery to be further improved.

Note that the first insulating portion 121 and third insulating portion123 may come into contact with each other, by the first overhang portion121 a and third overhang portion 123 a coming into contact, asillustrated in FIG. 10.

Alternatively, the first insulating portion 121 and third insulatingportion 123 may come into contact with each other, by the first overhangportion 121 a and third insulating portion 123 coming into contact, asillustrated in FIG. 11.

Alternatively, the first insulating portion 121 and third insulatingportion 123 may come into contact with each other, first insulatingportion 121 and third overhang portion 123 a coming into contact, asillustrated in FIG. 12.

Note that in the present disclosure, the expression, “a configurationwhere a predetermined layer and another predetermined layer arepositioned facing each other” means that “part of the principal face (orthe entire region of the principal face) of the predetermined layer issituated overlapping “part of the principal face (or the entire regionof the principal face) of the other predetermined layer, as viewed fromthe laminating direction of the layers”, for example.

Also, in the present disclosure, the expression, “a configuration wherea predetermined layer and another predetermined layer are positionedfacing each other” also encompasses “a configuration where a separatemember (e.g., a layer made of a separate material) is disposed between aprincipal face of the predetermined layer and a principal face of theother predetermined layer that face each other”.

In the present disclosure, at least one of the first power-generatingelement 310, second power-generating element 320, and thirdpower-generating element 330 may be a laminated battery where multiplebattery cells have been laminated.

For example, the first power-generating element 310 may be a laminatedbattery of a power-generating element 310 a and a power-generatingelement 310 b, which will be described later. Also, the secondpower-generating element 320 may be a laminated battery of apower-generating element 320 a and a power-generating element 320 b.Further, the third power-generating element 330 may be a laminatedbattery of a power-generating element 330 a and a power-generatingelement 330 b.

A manufacturing method of the battery according to the first embodimentwill be described later as a third embodiment.

Second Embodiment

A second embodiment will be described below. Description that isredundant with that of the above-described first embodiment will beomitted as appropriate.

FIG. 13 is a perspective view illustrating a schematic configuration ofa battery 2000 according to a second embodiment.

FIG. 14 is an x-z diagram (cross-sectional view taken along XIV-XIV inFIG. 13) illustrating a schematic configuration of the battery 2000according to the second embodiment.

FIG. 15 is a y-z diagram (cross-sectional view taken along XV-XV in FIG.13) illustrating a schematic configuration of the battery 2000 accordingto the second embodiment.

The battery 2000 according to the second embodiment further includes thefollowing configuration, in addition to the configuration of theabove-described battery 1000 according to the first embodiment.

That is to say, the battery 2000 according to the second embodimentincludes a second current collector 200, a fourth electrode layer 315,and a fourth counter electrode layer 314.

The fourth counter electrode layer 314 is a counter electrode of thefirst electrode layer 311 and fourth electrode layer 315.

The second current collector 200 has a fifth electroconductive portion211.

The fifth electroconductive portion 211 is disposed between the firstelectroconductive portion 111 and second electroconductive portion 112.

The fourth electrode layer 315 is disposed at a position facing thefirst counter electrode layer 312, in contact with the fifthelectroconductive portion 211.

The fourth counter electrode layer 314 is disposed at a position facingthe first electrode layer 311, in contact with the fifthelectroconductive portion 211.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100 and second currentcollector 200. That is to say, a power-generating element(power-generating element 310 a) including the first electrode layer 311and fourth counter electrode layer 314, and a power-generating element(power-generating element 310 b) including the fourth electrode layer315 and first counter electrode layer 312, can be laminated by serialconnection via the second current collector 200 (i.e., the fifthelectroconductive portion 211 of the second current collector 200). Atthis time, the positional relationship between the components of thepower-generating element 310 a and power-generating element 310 b can bestrongly maintained by the first insulating portion 121 (in other words,by the first current collector 100 that is one component). Accordingly,the power-generating elements (e.g., the power-generating element 310 aand power-generating element 310 b) making up the battery can beprevented from exhibiting positional shifting or separation due toshock, vibration, and so forth, when manufacturing the battery or usingthe battery, for example. Thus, the reliability of the battery can beimproved while raising the battery voltage by the serial connection ofthe power-generating element 310 a and power-generating element 310 b.

Note that the battery 2000 according to the second embodiment mayfurther include a first solid electrolyte layer 313, as illustrated inFIGS. 14 and 15.

The first solid electrolyte layer 313 is disposed between the firstelectrode layer 311 and fourth counter electrode layer 314.

According to the above configuration, one solid battery cell(power-generating element 310 a) can be configured from the firstelectrode layer 311, fourth counter electrode layer 314, and first solidelectrolyte layer 313.

The first solid electrolyte layer 313 may be disposed in the battery2000 according to the second embodiment in contact with the firstelectroconductive portion 111 and fifth electroconductive portion 211.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between first electroconductive portion 111 andfifth electroconductive portion 211 can be improved by the first solidelectrolyte layer 313. Accordingly, the fourth counter electrode layer314 can be suppressed from peeling loose from the fifthelectroconductive portion 211. Further, the first electrode layer 311can be suppressed from peeling loose from the first electroconductiveportion 111. Thus, the layers making up the power-generating element 310a can be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, reliability of the battery can beimproved even further.

Note that the first electrode layer 311 and fourth counter electrodelayer 314 may be formed in a narrower range than the firstelectroconductive portion 111 and fifth electroconductive portion 211,as illustrated in FIGS. 14 and 15.

Also, the first solid electrolyte layer 313 may be disposed over agreater area than that of the first electrode layer 311 and fourthcounter electrode layer 314. That is to say, the first solid electrolytelayer 313 may be disposed in a form covering the first electrode layer311 and fourth counter electrode layer 314, as illustrated in FIGS. 14and 15. Thus, short-circuiting of the first electrode layer 311 andfourth counter electrode layer 314 due to direct contact can beprevented.

Also, the first solid electrolyte layer 313 may be disposed over anarrower range than the first electroconductive portion 111 and fifthelectroconductive portion 211, as illustrated in FIGS. 14 and 15.Alternatively, the range of formation of the first solid electrolytelayer 313 may be the same range as that of the first electroconductiveportion 111 and fifth electroconductive portion 211.

The battery 2000 according to the second embodiment may further beprovided with a fourth solid electrolyte layer 316, as illustrated inFIGS. 14 and 15.

The fourth solid electrolyte layer 316 is disposed between the fourthelectrode layer 315 and first counter electrode layer 312.

According to the above configuration, one solid battery cell(power-generating element 310 b) can be configured from the fourthelectrode layer 315, first counter electrode layer 312, and fourth solidelectrolyte layer 316.

The fourth solid electrolyte layer 316 may be disposed in the battery2000 according to the second embodiment in contact with the secondelectroconductive portion 112 and fifth electroconductive portion 211.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between second electroconductive portion 112 andfifth electroconductive portion 211 can be improved by the fourth solidelectrolyte layer 316. Accordingly, the first counter electrode layer312 can be suppressed from peeling loose from the secondelectroconductive portion 112. Further, the fourth electrode layer 315can be suppressed from peeling loose from the fifth electroconductiveportion 211. Thus, the layers making up the power-generating element 310b can be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, reliability of the battery can beimproved even further.

Note that the fourth electrode layer 315 and first counter electrodelayer 312 may be formed in a narrower range than the secondelectroconductive portion 112 and fifth electroconductive portion 211,as illustrated in FIGS. 14 and 15.

Also, the fourth solid electrolyte layer 316 may be disposed over agreater area than that of the fourth electrode layer 315 and firstcounter electrode layer 312. That is to say, the fourth solidelectrolyte layer 316 may be disposed in a form covering the fourthelectrode layer 315 and first counter electrode layer 312, asillustrated in FIGS. 14 and 15. Thus, short-circuiting of the fourthelectrode layer 315 and first counter electrode layer 312 due to directcontact can be prevented.

Also, the fourth solid electrolyte layer 316 may be disposed over anarrower range than the second electroconductive portion 112 and fifthelectroconductive portion 211, as illustrated in FIGS. 14 and 15.Alternatively, the range of formation of the fourth solid electrolytelayer 316 may be the same range as that of the second electroconductiveportion 112 and fifth electroconductive portion 211.

Note that the first electrode layer 311 and fourth electrode layer 315may be negative active material layers. The electrode material here is anegative active material. The first electroconductive portion 111 is anegative current collector. The first counter electrode layer 312 andfourth counter electrode layer 314 are positive active material layers.The counter electrode material is a positive active material. The fifthelectroconductive portion 211 is a bipolar current collector. The secondelectroconductive portion 112 is a positive current collector.

Alternatively, the first electrode layer 311 and fourth electrode layer315 may be positive active material layers. The electrode material hereis a positive active material. The first electroconductive portion 111is a positive current collector. The first counter electrode layer 312and fourth counter electrode layer 314 are negative active materiallayers. The counter electrode material is a negative active material.The fifth electroconductive portion 211 is a bipolar current collector.The second electroconductive portion 112 is a negative currentcollector.

FIG. 16 is a perspective view illustrating a schematic configuration ofa battery 2100 according to the second embodiment.

FIG. 17 is an x-z diagram (cross-sectional view taken along XVII-XIVIIin FIG. 16) illustrating a schematic configuration of the battery 2100according to the second embodiment.

FIG. 18 is a y-z diagram (cross-sectional view taken along XVIII-XVIIIin FIG. 16) illustrating a schematic configuration of the battery 2100according to the second embodiment.

The battery 2100 according to the second embodiment further includes thefollowing configuration, in addition to the configuration of theabove-described battery 2000 according to the second embodiment.

That is to say, the battery 2100 according to the second embodimentincludes a second electrode layer 321 and a fifth counter electrodelayer 324.

The fifth counter electrode layer 324 is a counter electrode of thefirst electrode layer 311, second electrode layer 321, and fourthelectrode layer 315.

The second current collector 200 has a sixth electroconductive portion212 and a fourth insulating portion 221.

The second electrode layer 321 is disposed in contact with the secondelectroconductive portion 112.

The fifth counter electrode layer 324 is disposed in contact with thesixth electroconductive portion 212.

The fourth insulating portion 221 is a member linking the fifthelectroconductive portion 211 and sixth electroconductive portion 212.

The second current collector 200 is folded at the fourth insulatingportion 221, whereby the second electrode layer 321 and fifth counterelectrode layer 324 are positioned facing each other.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thefourth electrode layer 315 and fifth counter electrode layer 324 caneach be respectively disposed to the fifth electroconductive portion 211and sixth electroconductive portion 212 linked to each other by thefourth insulating portion 221. Thus, the positional relationship betweenthe fourth electrode layer 315 disposed on the fifth electroconductiveportion 211 and the fifth counter electrode layer 324 disposed on thesixth electroconductive portion 212 can be strongly maintained by thefourth insulating portion 221 (in other words, by the second currentcollector 200 that is one component). Accordingly, the layers (e.g., thefourth electrode layer 315 and fifth counter electrode layer 324) makingup the battery can be prevented from exhibiting positional shifting orseparation due to shock, vibration, and so forth, when manufacturing thebattery or using the battery, for example.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100 and second currentcollector 200. That is to say, a power-generating element(power-generating element 310 b) including the fourth electrode layer315 and first counter electrode layer 312, and a power-generatingelement (power-generating element 320 a) including the second electrodelayer 321 and fifth counter electrode layer 324, can be laminated byserial connection via the first current collector 100 (i.e., the secondelectroconductive portion 112 of the first current collector 100).Accordingly, the positional relationship between the components of thepower-generating element 310 b and power-generating element 320 a can bestrongly maintained by the fourth insulating portion 221 (in otherwords, by the second current collector 200 that is one component).Accordingly, the power-generating elements (e.g., the power-generatingelement 310 b and power-generating element 320 a) making up the batterycan be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, the reliability of the battery canbe improved while raising the battery voltage by the serial connectionof the power-generating element 310 b and power-generating element 320a.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the fourth insulating portion 221 issituated can be covered by the fourth insulating portion 221.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the fourth insulating portion 221 is situated, can beprevented by the fourth insulating portion 221. Thus, short-circuitingamong batteries due to contact can be suppressed. Also, partialdestruction of the side face of the battery by contact between thebattery and members that may exist outside of the battery can besuppressed. Even if a part of components (e.g., electrode materialincluded in the second electrode layer 321 or fourth electrode layer315, counter electrode material included in the first counter electrodelayer 312 or fifth counter electrode layer 324, and so forth) of thebattery falls loose, the fallen component can be suppressed by thefourth insulating portion 221 from moving to another cell portion withinthe battery (e.g., power-generating element 310 a, etc.) or to theoutside of the battery, due to part of the side face of the batterybeing covered by the fourth insulating portion 221. Accordingly,short-circuiting within the battery due to fallen components of thebattery can be suppressed. This enables the reliability of the batteryto be further improved.

Note that the battery 2100 according to the second embodiment mayfurther include a second solid electrolyte layer 323, as illustrated inFIGS. 17 and 18.

The second solid electrolyte layer 323 is disposed between the secondelectrode layer 321 and fifth counter electrode layer 324.

According to the above configuration, one solid battery cell(power-generating element 320 a) can be configured from the secondelectrode layer 321, fifth counter electrode layer 324, and second solidelectrolyte layer 323.

The second solid electrolyte layer 323 may be disposed in the battery2100 according to the second embodiment in contact with the secondelectroconductive portion 112 and sixth electroconductive portion 212.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between the second electroconductive portion 112 andsixth electroconductive portion 212 can be improved by the second solidelectrolyte layer 323. Accordingly, the fifth counter electrode layer324 can be suppressed from peeling loose from the sixthelectroconductive portion 212. Further, the second electrode layer 321can be suppressed from peeling loose from the second electroconductiveportion 112. Thus, the layers making up the power-generating element 320a can be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, reliability of the battery can beimproved even further.

Note that the second electrode layer 321 and fifth counter electrodelayer 324 may be formed in a narrower range than the secondelectroconductive portion 112 and sixth electroconductive portion 212,as illustrated in FIGS. 17 and 18.

Also, the second solid electrolyte layer 323 may be disposed over agreater area than that of the second electrode layer 321 and fifthcounter electrode layer 324. That is to say, the second solidelectrolyte layer 323 may be disposed in a form covering the secondelectrode layer 321 and fifth counter electrode layer 324, asillustrated in FIGS. 17 and 18. Thus, short-circuiting of the secondelectrode layer 321 and fifth counter electrode layer 324 due to directcontact can be prevented.

Also, the second solid electrolyte layer 323 may be disposed over anarrower range than the second electroconductive portion 112 and sixthelectroconductive portion 212, as illustrated in FIGS. 17 and 18.Alternatively, the range of formation of the second solid electrolytelayer 323 may be the same range as that of the second electroconductiveportion 112 and sixth electroconductive portion 212.

The fourth insulating portion 221 is linked to the fifthelectroconductive portion 211 and sixth electroconductive portion 212.That is to say, one end of the fourth insulating portion 221 isconnected (e.g., bonded) to the fifth electroconductive portion 211(e.g., an end of the fifth electroconductive portion 211). Another endof the fourth insulating portion 221 is connected (e.g., bonded) to thesixth electroconductive portion 212 (e.g., an end of the sixthelectroconductive portion 212).

A connection method of at least one (e.g., both) of the fifthelectroconductive portion 211 and sixth electroconductive portion 212 tothe fourth insulating portion 221 may be different from the connectionmethod of at least one (e.g., both) of the first electroconductiveportion 111 and second electroconductive portion 112 to the firstinsulating portion 121, or may be the same.

Note that the first electrode layer 311, second electrode layer 321, andfourth electrode layer 315 may be negative active material layers. Theelectrode material here is a negative active material. The firstelectroconductive portion 111 is a negative current collector. The firstcounter electrode layer 312, fourth counter electrode layer 314, andfifth counter electrode layer 324 are positive active material layers.The counter electrode material is a positive active material. The secondelectroconductive portion 112 and fifth electroconductive portion 211are bipolar current collectors. The sixth electroconductive portion 212is a positive current collector.

Alternatively, the first electrode layer 311, second electrode layer321, and fourth electrode layer 315 may be positive active materiallayers. The electrode material here is a positive active material. Thefirst electroconductive portion 111 is a positive current collector. Thefirst counter electrode layer 312, fourth counter electrode layer 314,and fifth counter electrode layer 324 are negative active materiallayers. The counter electrode material is a negative active material.The second electroconductive portion 112 and fifth electroconductiveportion 211 are bipolar current collectors. The sixth electroconductiveportion 212 is a negative current collector.

FIG. 19 is a perspective view illustrating a schematic configuration ofa battery 2200 according to the second embodiment.

FIG. 20 is an x-z diagram (cross-sectional view taken along XX-XX inFIG. 19) illustrating a schematic configuration of the battery 2200according to the second embodiment.

FIG. 21 is a y-z diagram (cross-sectional view taken along XXI-XXI inFIG. 19) illustrating a schematic configuration of the battery 2200according to the second embodiment.

The battery 2200 according to the second embodiment further includes thefollowing configuration, in addition to the configuration of theabove-described battery 2100 according to the second embodiment.

That is to say, the battery 2200 according to the second embodimentfurther includes a fifth electrode layer 325 and second counterelectrode layer 322.

The second counter electrode layer 322 is a counter electrode of thefirst electrode layer 311, second electrode layer 321, fourth electrodelayer 315, and fifth electrode layer 325.

The first current collector 100 has the second insulating portion 122and third electroconductive portion 113.

The fifth electrode layer 325 is disposed in contact with the sixthelectroconductive portion 212.

The second counter electrode layer 322 is disposed in contact with thethird electroconductive portion 113.

The second insulating portion 122 is a member linking the secondelectroconductive portion 112 and third electroconductive portion 113.

The first current collector 100 is folded at the second insulatingportion 122, whereby the fifth electrode layer 325 and second counterelectrode layer 322 are positioned facing each other.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved, That is to say, thesecond electrode layer 321 and second counter electrode layer 322 caneach be respectively disposed to the second electroconductive portion112 and third electroconductive portion 113 linked to each other by thesecond insulating portion 122. Thus, the positional relationship betweenthe second electrode layer 321 disposed on the second electroconductiveportion 112 and the second counter electrode layer 322 disposed on thethird electroconductive portion 113 can be strongly maintained by thesecond insulating portion 122 (in other words, by the first currentcollector 100 that is one component). Accordingly, the layers (e.g., thesecond electrode layer 321 and second counter electrode layer 322)making up the battery can be prevented from exhibiting positionalshifting or separation due to shock, vibration, and so forth, whenmanufacturing the battery or using the battery, for example.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100 and second currentcollector 200. That is to say, a power-generating element(power-generating element 320 a) including the second electrode layer321 and fifth counter electrode layer 324, and a power-generatingelement (power-generating element 320 b) including the fifth electrodelayer 325 and second counter electrode layer 322, can be laminated byserial connection via the second current collector 200 (i.e., the sixthelectroconductive portion 212 of the second current collector 200).Accordingly, the positional relationship between the components of thepower-generating element 320 a and power-generating element 320 b can bestrongly maintained by the second insulating portion 122 (in otherwords, by the first current collector 100 that is one component).Accordingly, the power-generating elements (e.g., the power-generatingelement 320 a and power-generating element 320 b) making up the batterycan be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, the reliability of the battery canbe improved while raising the battery voltage by the serial connectionof the power-generating element 320 a and power-generating element 320b.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the second insulating portion 122 issituated can be covered by the second insulating portion 122.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the second insulating portion 122 is situated, can beprevented by the second insulating portion 122. Thus, short-circuitingamong batteries can be suppressed. Also, partial destruction of the sideface of the battery by contact between the battery and members that mayexist outside of the battery can be suppressed. Even if a part ofcomponents (e.g., electrode material included in the second electrodelayer 321 or fifth electrode layer 325, counter electrode materialincluded in the second counter electrode layer 322 or fifth counterelectrode layer 324, and so forth) of the battery falls loose, thefallen component can be suppressed by the second insulating portion 122from moving to another cell portion within the battery (e.g.,power-generating element 310 a, power-generating element 310 b, etc.) orto the outside of the battery, due to part of the side face of thebattery being covered by the second insulating portion 122. Accordingly,short-circuiting within the battery due to fallen components of thebattery can be suppressed. This enables the reliability of the batteryto be further improved.

Note that the battery 2200 according to the second embodiment mayfurther include a fifth solid electrolyte layer 326, as illustrated inFIGS. 20 and 21.

The fifth solid electrolyte layer 326 is disposed between the fifthelectrode layer 325 second counter electrode layer 322.

According to the above configuration, one solid battery cell(power-generating element 320 b) can be configured from the fifthelectrode layer 325, second counter electrode layer 322, and fifth solidelectrolyte layer 326.

The fifth solid electrolyte layer 326 may be disposed in the battery2200 according to the second embodiment in contact with the thirdelectroconductive portion 113 and sixth electroconductive portion 212.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between the third electroconductive portion 113 andsixth electroconductive portion 212 can be improved by the fifth solidelectrolyte layer 326. Accordingly, the second counter electrode layer322 can be suppressed from peeling loose from the thirdelectroconductive portion 113. Further, the fifth electrode layer 325can be suppressed from peeling loose from the sixth electroconductiveportion 212. Thus, the layers making up the power-generating element 320b can be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, reliability of the battery can beimproved even further.

Note that the fifth electrode layer 325 and second counter electrodelayer 322 may be formed in a narrower range than the thirdelectroconductive portion 113 and sixth electroconductive portion 212,as illustrated in FIGS. 20 and 21.

Also, the fifth solid electrolyte layer 326 may be disposed over agreater area than that of the fifth electrode layer 325 and secondcounter electrode layer 322, as illustrated in FIGS. 20 and 21. That isto say, the fifth solid electrolyte layer 326 may be disposed in a formcovering the fifth electrode layer 325 and second counter electrodelayer 322. Thus, short-circuiting of the fifth electrode layer 325 andsecond counter electrode layer 322 due to direct contact can beprevented.

Also, the fifth solid electrolyte layer 326 may be disposed over anarrower range than the third electroconductive portion 113 and sixthelectroconductive portion 212, as illustrated in FIGS. 20 and 21.Alternatively, the range of formation of the fifth solid electrolytelayer 326 may be the same range as that of the third electroconductiveportion 113 and sixth electroconductive portion 212.

Note that the first electrode layer 311, second electrode layer 321,fourth electrode layer 315, and fifth electrode layer 325 may benegative active material layers. The electrode material here is anegative active material. The first electroconductive portion 111 is anegative current collector. The first counter electrode layer 312,second counter electrode layer 322, fourth counter electrode layer 314,and fifth counter electrode layer 324 are positive active materiallayers. The counter electrode material is a positive active material.The second electroconductive portion 112, fifth electroconductiveportion 211, and sixth electroconductive portion 212 are bipolar currentcollectors. The third electroconductive portion 113 is a positivecurrent collector.

Note that the first electrode layer 311, second electrode layer 321,fourth electrode layer 315, and fifth electrode layer 325 may bepositive active material layers. The electrode material here is apositive active material. The first electroconductive portion 111 is apositive current collector. The first counter electrode layer 312,second counter electrode layer 322, fourth counter electrode layer 314,and fifth counter electrode layer 324 are negative active materiallayers. The counter electrode material is a negative active material.The second electroconductive portion 112, fifth electroconductiveportion 211, and sixth electroconductive portion 212 are bipolar currentcollectors. The third electroconductive portion 113 is a negativecurrent collector.

FIG. 22 is a perspective view illustrating a schematic configuration ofa battery 2300 according to the second embodiment.

FIG. 23 is an x-z diagram (cross-sectional view taken along XXIII-XXIIIin FIG. 22) illustrating a schematic configuration of the battery 2300according to the second embodiment.

FIG. 24 is a y-z diagram (cross-sectional view taken along XXIV-XXIV inFIG. 22) illustrating a schematic configuration of the battery 2300according to the second embodiment.

The battery 2300 according to the second embodiment further includes thefollowing configuration, in addition to the configuration of theabove-described battery 2200 according to the second embodiment.

That is to say, the battery 2300 according to the second embodimentfurther includes the third electrode layer 331 and a sixth counterelectrode layer 334.

The sixth counter electrode layer 334 is a counter electrode of thefirst electrode layer 311, second electrode layer 321, third electrodelayer 331, fourth electrode layer 315, and fifth electrode layer 325.

The second current collector 200 has a seventh electroconductive portion213 and a fifth insulating portion 222.

The third electrode layer 331 is disposed in contact with the thirdelectroconductive portion 113.

The sixth counter electrode layer 334 is disposed in contact with theseventh electroconductive portion 213.

The fifth insulating portion 222 is a member linking the sixthelectroconductive portion 212 and seventh electroconductive portion 213.

The second current collector 200 is folded at the fifth insulatingportion 222, whereby the third electrode layer 331 and sixth counterelectrode layer 334 are positioned facing each other.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thefifth electrode layer 325 and sixth counter electrode layer 334 can eachbe respectively disposed to the sixth electroconductive portion 212 andseventh electroconductive portion 213 linked to each other by the fifthinsulating portion 222. Thus, the positional relationship between thefifth electrode layer 325 disposed on the sixth electroconductiveportion 212 and the sixth counter electrode layer 334 disposed on theseventh electroconductive portion 213 can be strongly maintained by thefifth insulating portion 222 (in other words, by the second currentcollector 200 that is one component). Accordingly, the layers (e.g., thefifth electrode layer 325 and sixth counter electrode layer 334) makingup the battery can be prevented from exhibiting positional shifting orseparation due to shock, vibration, and so forth, when manufacturing thebattery or using the battery, for example.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100 and second currentcollector 200. That is to say, a power-generating element(power-generating element 320 b) including the fifth electrode layer 325and second counter electrode layer 322, and a power-generating element(power-generating element 330 a) including the third electrode layer 331and sixth counter electrode layer 334, can be laminated by serialconnection via the first current collector 100 (i.e., the thirdelectroconductive portion 113 of the first current collector 100).Accordingly, the positional relationship between the components of thepower-generating element 320 b and power-generating element 330 a can bestrongly maintained by the fifth insulating portion 222 (in other words,by the second current collector 200 that is one component). Accordingly,the power-generating elements (e.g., the power-generating element 320 band power-generating element 330 a) making up the battery can beprevented from exhibiting positional shifting or separation due toshock, vibration, and so forth, when manufacturing the battery or usingthe battery, for example. Thus, the reliability of the battery can beimproved while raising the battery voltage by the serial connection ofthe power-generating element 320 b and power-generating element 330 a.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the fifth insulating portion 222 issituated can be covered by the fifth insulating portion 222.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the fifth insulating portion 222 is situated, can beprevented by the fifth insulating portion 222. Thus, short-circuitingamong batteries due to contact can be suppressed. Also, partialdestruction of the side face of the battery by contact between thebattery and members that may exist outside of the battery can besuppressed. Even if a part of components (e.g., electrode materialincluded in the third electrode layer 331 or fifth electrode layer 325,counter electrode material included in the second counter electrodelayer 322 or sixth counter electrode layer 334, and so forth) of thebattery falls loose, the fallen component can be suppressed by the fifthinsulating portion 222 from moving to another cell portion within thebattery (e.g., first power-generating element 310, power-generatingelement 320 a, etc.) or to the outside of the battery, due to part ofthe side face of the battery being covered by the fifth insulatingportion 222. Accordingly, short-circuiting within the battery due tofallen components of the battery can be suppressed. This enables thereliability of the battery to be further improved.

Note that the battery 2300 according to the second embodiment mayfurther include the third solid electrolyte layer 333, as illustrated inFIGS. 23 and 24.

The third solid electrolyte layer 333 is disposed between the thirdelectrode layer 331 and sixth counter electrode layer 334.

According to the above configuration, one solid battery cell(power-generating element 330 a) can be configured from the thirdelectrode layer 331, sixth counter electrode layer 334, and third solidelectrolyte layer 333.

The third solid electrolyte layer 333 may be disposed in the battery2300 according to the second embodiment in contact with the thirdelectroconductive portion 113 and seventh electroconductive portion 213.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved, That is to say, thestrength of bonding between the third electroconductive portion 113 andseventh electroconductive portion 213 can be improved by the third solidelectrolyte layer 333. Accordingly, the sixth counter electrode layer334 can be suppressed from peeling loose from the seventhelectroconductive portion 213. Further, the third electrode layer 331can be suppressed from peeling loose from the third electroconductiveportion 113. Thus, the layers making up the power-generating element 330a can be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, reliability of the battery can beimproved even further.

Note that the third electrode layer 331 and sixth counter electrodelayer 334 may be formed in a narrower range than the thirdelectroconductive portion 113 and seventh electroconductive portion 213,as illustrated in FIGS. 23 and 24.

Also, the third solid electrolyte layer 333 may be disposed over agreater area than that of the third electroconductive layer 331 andsixth counter electrode layer 334, as illustrated in FIGS. 23 and 24,That is to say, the third solid electrolyte layer 333 may be disposed ina form covering the third electroconductive layer 331 and sixth counterelectrode layer 334. Thus, short-circuiting of the thirdelectroconductive layer 331 and sixth counter electrode layer 334 due todirect contact can be prevented.

Also, the third solid electrolyte layer 333 may be disposed over anarrower range than the third electroconductive portion 113 and seventhelectroconductive portion 213, as illustrated in FIGS. 23 and 24.Alternatively, the range of formation of the third solid electrolytelayer 333 may be the same range as that of the third electroconductiveportion 113 and seventh electroconductive portion 213.

The fifth insulating portion 222 is linked to the sixthelectroconductive portion 212 and seventh electroconductive portion 213.That is to say, one end of the fifth insulating portion 222 is connected(e.g., bonded) to the sixth electroconductive portion 212 (e.g., an endof the sixth electroconductive portion 212). Another end of the fifthinsulating portion 222 is connected (e.g., bonded) to the seventhelectroconductive portion 213 (e.g., an end of the seventhelectroconductive portion 213).

A connection method of at least one (e.g., both) of the sixthelectroconductive portion 212 and seventh electroconductive portion 213to the fifth insulating portion 222 may be different from the connectionmethod of at least one (e.g., both) of the fifth electroconductiveportion 211 and sixth electroconductive portion 212 to the fourthinsulating portion 221, or may be the same.

Note that the end of the sixth electroconductive portion 212 (i.e., in acase where the sixth electroconductive portion 212 is rectangular, oneside of the rectangle) to which the fifth insulating portion 222 isconnected may be different from the end of the sixth electroconductiveportion 212 to which the fourth insulating portion 221 is connected, ormay be the same. That is to say, the end of the sixth electroconductiveportion 212 to which the fifth insulating portion 222 is connected maybe an end situated across from the end of the sixth electroconductiveportion 212 to which the fourth insulating portion 221 is connected, asillustrated in FIGS. 23 and 24. Alternatively, the end of the sixthelectroconductive portion 212 to which the fifth insulating portion 222is connected may be an end adjacent to the end of the sixthelectroconductive portion 212 to which the fourth insulating portion 221is connected.

Note that the first electrode layer 311, second electrode layer 321,third electrode layer 331, fourth electrode layer 315, and fifthelectrode layer 325 may be negative active material layers. Theelectrode material here is a negative active material. The firstelectroconductive portion 111 is a negative current collector. The firstcounter electrode layer 312, second counter electrode layer 322, fourthcounter electrode layer 314, fifth counter electrode layer 324, andsixth counter electrode layer 334 are positive active material layers.The counter electrode material is a positive active material. The secondelectroconductive portion 112, third electroconductive portion 113,fifth electroconductive portion 211, and sixth electroconductive portion212 are bipolar current collectors. The seventh electroconductiveportion 213 is a positive current collector.

Alternatively, the first electrode layer 311, second electrode layer321, third electrode layer 331, fourth electrode layer 315, and fifthelectrode layer 325 may be positive active material layers. Theelectrode material here is a positive active material. The firstelectroconductive portion 111 is a positive current collector. The firstcounter electrode layer 312, second counter electrode layer 322, fourthcounter electrode layer 314, fifth counter electrode layer 324, andsixth counter electrode layer 334 are negative active material layers.The counter electrode material is a negative active material. The secondelectroconductive portion 112, third electroconductive portion 113,fifth electroconductive portion 211, and sixth electroconductive portion212 are bipolar current collectors. The seventh electroconductiveportion 213 is a negative current collector.

FIG. 25 is a perspective view illustrating a schematic configuration ofa battery 2400 according to the second embodiment.

FIG. 26 is an x-z diagram (cross-sectional view taken along XXVI-XXVI inFIG. 25) illustrating a schematic configuration of the battery 2400according to the second embodiment.

FIG. 27 is a y-z diagram (cross-sectional view taken along XXVII-XXVIIin FIG. 25) illustrating a schematic configuration of the battery 2400according to the second embodiment.

The battery 2400 according to the second embodiment further includes thefollowing configuration, in addition to the configuration of theabove-described battery 2300 according to the second embodiment.

That is to say, the battery 2400 according to the second embodimentfurther includes the sixth electrode layer 335 and third counterelectrode layer 332.

The third counter electrode layer 332 is a counter electrode of thefirst electrode layer 311, second electrode layer 321, third electrodelayer 331, fourth electrode layer 315, fifth electrode layer 325, andsixth electrode layer 335.

The first current collector 100 has the third insulating portion 123 andfourth electroconductive portion 114.

The sixth electrode layer 335 is disposed in contact with the seventhelectroconductive portion 213.

The third counter electrode layer 332 is disposed in contact with thefourth electroconductive portion 114.

The third insulating portion 123 is a member linking the thirdelectroconductive portion 113 and fourth electroconductive portion 114.

The first current collector 100 is folded at the third insulatingportion 123, whereby the sixth electrode layer 335 and third counterelectrode layer 332 are positioned facing each other.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved, That is to say, thethird electrode layer 331 and third counter electrode layer 332 can eachbe respectively disposed to the third electroconductive portion 113 andfourth electroconductive portion 114 linked to each other by the thirdinsulating portion 123. Thus, the positional relationship between thethird electrode layer 331 disposed on the third electroconductiveportion 113 and the third counter electrode layer 332 disposed on thefourth electroconductive portion 114 can be strongly maintained by thethird insulating portion 123 (in other words, by the first currentcollector 100 that is one component). Accordingly, the layers (e.g., thethird electrode layer 331 and third counter electrode layer 332) makingup the battery can be prevented from exhibiting positional shifting orseparation due to shock, vibration, and so forth, when manufacturing thebattery or using the battery, for example.

Also, according to the above configuration, a laminated battery can beconfigured using the first current collector 100 and second currentcollector 200. That is to say, a power-generating element(power-generating element 330 a) including the third electrode layer 331and sixth counter electrode layer 334, and a power-generating element(power-generating element 330 b) including the sixth electrode layer 335and third counter electrode layer 332, can be laminated by serialconnection via the second current collector 200 (i.e., the seventhelectroconductive portion 213 of the second current collector 200).Accordingly, the positional relationship between the components of thepower-generating element 330 a and power-generating element 330 b can bestrongly maintained by the third insulating portion 123 (in other words,by the first current collector 100 that is one component). Accordingly,the power-generating elements (e.g., the power-generating element 330 aand power-generating element 330 b) making up the battery can beprevented from exhibiting positional shifting or separation due toshock, vibration, and so forth, when manufacturing the battery or usingthe battery, for example. Thus, the reliability of the battery can beimproved while raising the battery voltage by the serial connection ofthe power-generating element 330 a and power-generating element 330 b.

Also, according to the above configuration, out of the side faces of thebattery, the side face where the third insulating portion 123 issituated can be covered by the third insulating portion 123.Accordingly, mutual contact between members that may exist outside ofthe battery (e.g., another battery, etc.), and the side face of thebattery where the third insulating portion 123 is situated, can beprevented by the third insulating portion 123, Thus, short-circuitingamong batteries can be suppressed. Also, partial destruction of the sideface of the battery by contact between the battery and members that mayexist outside of the battery can be suppressed. Even if a part ofcomponents (e.g., electrode material included in the third electrodelayer 331 or sixth electrode layer 335, counter electrode materialincluded in the third counter electrode layer 332 or sixth counterelectrode layer 334, and so forth) of the battery falls loose, thefallen component can be suppressed by the third insulating portion 123from moving to another cell portion within the battery (e.g., firstpower-generating element 310, second power-generating element 320, etc.)or to the outside of the battery, due to part of the side face of thebattery being covered by the third insulating portion 123. Accordingly,short-circuiting within the battery due to fallen components of thebattery can be suppressed. This enables the reliability of the batteryto be further improved.

Note that the battery 2400 according to the second embodiment mayfurther include a sixth solid electrolyte layer 336, as illustrated inFIGS. 26 and 27.

The sixth solid electrolyte layer 336 is disposed between the sixthelectrode layer 335 and third counter electrode layer 332.

According to the above configuration, one solid battery cell(power-generating element 330 b) can be configured from the sixthelectrode layer 335, third counter electrode layer 332, and fifth solidelectrolyte layer 326.

The sixth solid electrolyte layer 336 may be disposed in the battery2400 according to the second embodiment in contact with the fourthelectroconductive portion 114 and seventh electroconductive portion 213.

According to the above configuration, the strength of bonding betweencomponents of the battery can be further improved. That is to say, thestrength of bonding between the fourth electroconductive portion 114 andseventh electroconductive portion 213 can be improved by the sixth solidelectrolyte layer 336. Accordingly, the third counter electrode layer332 can be suppressed from peeling loose from the fourthelectroconductive portion 114. Further, the sixth electrode layer 335can be suppressed from peeling loose from the seventh electroconductiveportion 213. Thus, the layers making up the power-generating element 330b can be prevented from exhibiting positional shifting or separation dueto shock, vibration, and so forth, when manufacturing the battery orusing the battery, for example. Thus, reliability of the battery can beimproved even further.

Note that the sixth electrode layer 335 and third counter electrodelayer 332 may be formed in a narrower range than the fourthelectroconductive portion 114 and sixth electroconductive portion 212 asillustrated in FIGS. 26 and 27.

Also, the sixth solid electrolyte layer 336 may be disposed over agreater area than that of the sixth electrode layer 335 and thirdcounter electrode layer 332, as illustrated in FIGS. 26 and 27. That isto say, the sixth solid electrolyte layer 336 may be disposed in a formcovering the sixth electrode layer 335 and third counter electrode layer332. Thus, short-circuiting of the sixth electrode layer 335 and thirdcounter electrode layer 332 due to direct contact can be prevented.

Also, the sixth solid electrolyte layer 336 may be disposed over anarrower range than the fourth electroconductive portion 114 and seventhelectroconductive portion 213, as illustrated in FIGS. 26 and 27.Alternatively, the range of formation of the sixth solid electrolytelayer 336 may be the same range as that of the fourth electroconductiveportion 114 and seventh electroconductive portion 213.

Note that the first electrode layer 311, second electrode layer 321,third electrode layer 331, fourth electrode layer 315, fifth electrodelayer 325, and sixth electrode layer 335 may be negative active materiallayers. The electrode material here is a negative active material. Thefirst electroconductive portion 111 is a negative current collector. Thefirst counter electrode layer 312, second counter electrode layer 322,third counter electrode layer 332, fourth counter electrode layer 314,fifth counter electrode layer 324, and sixth counter electrode layer 334are positive active material layers. The counter electrode material is apositive active material. The second electroconductive portion 112,third electroconductive portion 113, fifth electroconductive portion211, sixth electroconductive portion 212, and seventh electroconductiveportion 213 are bipolar current collectors. The fourth electroconductiveportion 114 is a positive current collector.

Alternatively, the first electrode layer 311, second electrode layer321, third electrode layer 331, fourth electrode layer 315, fifthelectrode layer 325, and sixth electrode layer 335 may be positiveactive material layers. The electrode material here is a positive activematerial. The first electroconductive portion 111 is a positive currentcollector. The first counter electrode layer 312, second counterelectrode layer 322, third counter electrode layer 332, fourth counterelectrode layer 314, fifth counter electrode layer 324, and sixthcounter electrode layer 334 are negative active material layers. Thecounter electrode material is a negative active material. The secondelectroconductive portion 112, third electroconductive portion 113,fifth electroconductive portion 211, sixth electroconductive portion212, and seventh electroconductive portion 213 are bipolar currentcollectors. The fourth electroconductive portion 114 is a negativecurrent collector.

FIG. 28 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery 2500 according to the second embodiment.

FIG. 29 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery 2600 according to the second embodiment.

FIG. 30 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery 2700 according to the second embodiment.

The fourth insulating portion 221 may have at least one of a fourthoverhang portion 221 a and a fourth overhang portion 221 b.

The fourth overhang portion 221 a is a portion that overhangs from thefifth electroconductive portion 211 toward the side where the fourthcounter electrode layer 314 is disposed (part of the fourth insulatingportion 221), as illustrated in FIGS. 28 and 30.

According to the above configuration, the side faces of componentmembers situated toward the side where the fourth counter electrodelayer 314 is disposed from the fifth electroconductive portion 211(e.g., power-generating element 310 a, first electroconductive portion111, etc.) can be covered by the fourth overhang portion 221 a of thefourth insulating portion 221, while covering the side faces ofcomponent members interposed between the fifth electroconductive portion211 and sixth electroconductive portion 212 (e.g., power-generatingelement 310 b, power-generating element 320 a, second electroconductiveportion 112, etc.) by the fourth insulating portion 221. Accordingly,mutual contact between members that may exist outside of the battery(e.g., another battery, etc.), and the side faces of component membersinterposed between the fifth electroconductive portion 211 and sixthelectroconductive portion 212, and component members situated toward theside where the fourth counter electrode layer 314 is disposed from thefifth electroconductive portion 211, can be prevented by the fourthinsulating portion 221.

The fourth overhang portion 221 b is a portion that overhangs from thesixth electroconductive portion 212 toward the side where the fifthelectrode layer 325 is disposed (part of the fourth insulating portion221), as illustrated in FIGS. 28 and 29.

According to the above configuration, the side faces of componentmembers situated toward the side where the fifth electrode layer 325 isdisposed from the sixth electroconductive portion 212 (e.g.,power-generating element 320 b, power-generating element 330 a, thirdelectroconductive portion 113, etc.) can be covered by the fourthoverhang portion 221 b of the fourth insulating portion 221, whilecovering the side faces of component members interposed between thefifth electroconductive portion 211 and sixth electroconductive portion212 (e.g., power-generating element 310 b, power-generating element 320a, sixth electroconductive portion 212, etc.) the fourth insulatingportion 221. Accordingly, mutual contact between members that may existoutside of the battery (e.g., another battery, etc.), and the side facesof component members interposed between the fifth electroconductiveportion 211 and sixth electroconductive portion 212, and componentmembers situated toward the side where the fifth electrode layer 325 isdisposed from the sixth electroconductive portion 212, can be preventedby the fourth insulating portion 221.

The fifth insulating portion 222 may have at least one of a fifthoverhang portion 222 a and a fifth overhang portion 222 b.

The fifth overhang portion 222 a is a portion that overhangs from thesixth electroconductive portion 212 toward the side where the fifthcounter electrode layer 324 is disposed (part of the fifth insulatingportion 222), as illustrated in FIGS. 28 and 30.

According to the above configuration, the side faces of componentmembers situated toward the side where the fifth counter electrode layer324 is disposed from the sixth electroconductive portion 212 (e.g.,power-generating element 310 b, power-generating element 320 a, secondelectroconductive portion 112, etc.) can be covered by the fifthoverhang portion 222 a of the fifth insulating portion 222, whilecovering the side faces of component members interposed between thesixth electroconductive portion 212 and seventh electroconductiveportion 213 (e.g., power-generating element 320 b, power-generatingelement 330 a, third electroconductive portion 113, etc.) by the fifthinsulating portion 222. Accordingly, mutual contact between members thatmay exist outside of the battery (e.g., another battery, etc.), and theside faces of component members interposed between the sixthelectroconductive portion 212 and seventh electroconductive portion 213,and component members situated toward the side where the fifth counterelectrode layer 324 is disposed from the sixth electroconductive portion212, can be prevented by the fifth insulating portion 222.

The fifth overhang portion 222 b is a portion that overhangs from theseventh electroconductive portion 213 toward the side where the sixthelectrode layer 335 is disposed (part of the fifth insulating portion222), as illustrated in FIGS. 28 and 29.

According to the above configuration, the side faces of componentmembers situated toward the side where the sixth electrode layer 335 isdisposed from the seventh electroconductive portion 213 (e.g.,power-generating element 330 b, fourth electroconductive portion 114,etc.) can be covered by the fifth overhang portion 222 b of the fifthinsulating portion 222, while covering the side faces of componentmembers interposed between the sixth electroconductive portion 212 andseventh electroconductive portion 213 (e.g., power-generating element320 b, power-generating element 330 a, third electroconductive portion113, etc.) by the fifth insulating portion 222. Accordingly, mutualcontact between members that may exist outside of the battery (e.g.,another battery, etc.), and the side faces of component membersinterposed between the sixth electroconductive portion 212 and seventhelectroconductive portion 213, and component members situated toward theside where the fifth counter electrode layer 324 is disposed from thesixth electroconductive portion 212, can be prevented by the fifthinsulating portion 222.

FIG. 31 is a y-z diagram cross-sectional view) illustrating a schematicconfiguration of a battery 2510 according to the second embodiment.

FIG. 32 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery 2610 according to the second embodiment.

FIG. 33 is a y-z diagram (cross-sectional view) illustrating a schematicconfiguration of a battery 2710 according to the second embodiment.

The second current collector 200 may have a sixth insulating portion 223linked with the seventh electroconductive portion 213, as illustrated inFIGS. 31 through 33.

The fourth insulating portion 221 and sixth insulating portion 223 maycome into contact with each other, as illustrated in FIGS. 31 through33.

According to the above configuration, the side faces of componentmembers interposed between the sixth electroconductive portion 212 andseventh electroconductive portion 213 (e.g., power-generating element320 b, power-generating element 330 a, third electroconductive portion113, etc.) can be covered by at least one of the fourth insulatingportion 221 and sixth insulating portion 223, while covering the sidefaces of component members interposed between the fifthelectroconductive portion 211 and sixth electroconductive portion 212(e.g., power-generating element 310 b, power-generating element 320 a,second electroconductive portion 112, etc.) by the fourth insulatingportion 221. In other words, of the side faces of component membersinterposed between the sixth electroconductive portion 212 and seventhelectroconductive portion 213, side faces different from the side facescovered by the fifth insulating portion 222, can be covered by at leastone of the fourth insulating portion 221 and sixth insulating portion223. Accordingly, mutual contact between members that may exist outsideof the battery (e.g., another battery, etc.), and the side faces ofcomponent members interposed between the fifth electroconductive portion211 and seventh electroconductive portion 213 can be prevented by thefourth insulating portion 221 and sixth insulating portion 223. Even ifa part of components (e.g., counter electrode material included in thepower-generating element 320 b or power-generating element 330 a, and soforth) of the battery falls loose, the fallen component can besuppressed by the fourth insulating portion 221 and sixth insulatingportion 223 from moving to another cell portion (e.g., power-generatingelement 320 a, power-generating element 330 b, etc.) within the batteryor to the outside of the battery, due to part of the side of the batterybeing covered by the fourth insulating portion 221 and sixth insulatingportion 223. Accordingly, short-circuiting within the battery due tofallen components of the battery can be suppressed. This enables thereliability of the battery to be further improved.

The sixth insulating portion 223 may have a sixth overhang portion 223a, as illustrated in FIGS. 31 and 33.

The sixth overhang portion 223 a is a portion that overhangs from thesixth electroconductive portion 212 toward the side where the thirdcounter electrode layer 332 is disposed (part of the sixth insulatingportion 223), as illustrated in FIGS. 31 and 33.

Note that the fourth insulating portion 221 and sixth insulating portion223 may come into contact with each other, by the fourth overhangportion 221 b and sixth overhang portion 223 a coming into contact, asillustrated in FIG. 31.

Alternatively, the fourth insulating portion 221 and sixth insulatingportion 223 may come into contact with each other, by the fourthoverhang portion 221 b and sixth insulating portion 223 coming intocontact, as illustrated in FIG. 32.

Alternatively, the fourth insulating portion 221 and sixth insulatingportion 223 may come into contact with each other, by the fourthinsulating portion 221 and sixth overhang portion 223 a coming intocontact, as illustrated in FIG. 33.

Note that the fifth electroconductive portion 211, sixthelectroconductive portion 212, and seventh electroconductive portion 213are members having electroconductivity. The configurations of the firstelectroconductive portion 111, second electroconductive portion 112,third electroconductive portion 113, fourth electroconductive portion114, fifth electroconductive portion 211, sixth electroconductiveportion 212, and seventh electroconductive portion 213 (e.g.,thicknesses, area, shape, materials included, etc.) may be the same aseach other, or may be different.

The fourth insulating portion 221, fifth insulating portion 222, andsixth insulating portion 223 are members formed of insulating material(i.e., material having no electroconductivity or sufficiently lowelectroconductivity), Configurations of the first insulating portion121, second insulating portion 122, and third insulating portion 123,fourth insulating portion 221, fifth insulating portion 222, and sixthinsulating portion 223 (e.g., thicknesses, area, shape, materialsincluded, etc.) may be the same as each other, or may be different.

The fourth electrode layer 315, fifth electrode layer 325, and sixthelectrode layer 335 are layers including electrode material (e.g.,active material). Configurations of the first electrode layer 311,second electrode layer 321, third electrode layer 331, fourth electrodelayer 315, fifth electrode layer 325, and sixth electrode layer 335(e.g., thicknesses, area, shape, materials included, etc.) may be thesame as each other, or may be different.

The fourth counter electrode layer 314, fifth counter electrode layer324, and sixth counter electrode layer 334 are layers including counterelectrode material (e.g., active material). Counter electrode materialis material making up counter electrodes to the electrode material.Configurations of the first counter electrode layer 312, second counterelectrode layer 322, third counter electrode layer 332, fourth counterelectrode layer 314, fifth counter electrode layer 324, and sixthcounter electrode layer 334 (e.g., thicknesses, area, shape, materialsincluded, etc.) may be the same as each other, or may be different.

The fourth solid electrolyte layer 316, fifth solid electrolyte layer326, and sixth solid electrolyte layer 336 are solid electrolyte layersincluding a solid electrolyte. Configurations of the first solidelectrolyte layer 313, second solid electrolyte layer 323, third solidelectrolyte layer 333, fourth solid electrolyte layer 316, fifth solidelectrolyte layer 326, and sixth solid electrolyte layer 336 (e.g.,thicknesses, area, shape, materials included, etc.) may be the same aseach other, or may be different.

A manufacturing method of the battery according to the second embodimentwill be described later as a third embodiment.

Note that in the first and second embodiments, part (or all) of the sidefaces of the laminated battery (e.g., portions further on the outer sidefrom the insulating portions) may be covered by an insulating material(e.g., a sealant) that differs from the insulating portions.Accordingly, the serially-connected power-generating elements can besealed more strongly. The sealant here may be a moisture-preventinglaminating sheet. Thus, the sealant can prevent the power-generatingelements from deteriorating due to moisture. The laminated battery maybe contained within a sealing case, Commonly known battery cases (e.g.,laminating sacks, metal cans, resin cases, etc.) may be used as asealing case.

Also, the battery according to the first and second embodiments mayfurther have a pair of external electrodes. The pair of externalelectrodes may protrude to the outer side of the top and bottom faces(or side faces) of the laminated battery, in a case where the entiretyof the laminated battery is to be sealed by the sealant. One of theexternal electrodes may be connected to the first electroconductiveportion 111 situated at one end of the laminated battery, for example.The other of the external electrodes may be connected to, for example,the an electroconductive portion situated at the other end of thelaminated battery. This enables discharge to a load connected to thepair of external electrodes, and charging of the battery (thepower-generating elements) by a charging device connected to the pair ofexternal electrodes.

Third Embodiment

A third embodiment will be described below. Description that isredundant with that of the above-described first and second embodimentswill be omitted as appropriate.

FIG. 34 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus 3000 according to the third embodiment.

The battery manufacturing apparatus 3000 according to the thirdembodiment is provided with an electrode layer forming unit 410, acounter electrode layer forming unit 420, and a current collectorfolding unit 430.

The current collector folding unit 430 folds the first current collector100.

The first current collector 100 has the first electroconductive portion111, second electroconductive portion 112, and first insulating portion121.

The first insulating portion 121 is a member linking the firstelectroconductive portion 111 and second electroconductive portion 112.

The electrode layer forming unit 410 forms the first electrode layer 311in contact with the first electroconductive portion 111.

The counter electrode layer forming unit 420 forms the first counterelectrode layer 312 in contact with the second electroconductive portion112.

The first counter electrode layer 312 is a counter electrode of thefirst electrode layer 311.

FIG. 35 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method according to the third embodiment is abattery manufacturing method using the battery manufacturing apparatusaccording to the third embodiment. For example, the batterymanufacturing method according to the third embodiment is a batterymanufacturing method executed at the battery manufacturing apparatusaccording to the third embodiment.

The battery manufacturing method according to the third embodimentincludes a first electrode layer forming step S1101 (i.e., a step (a1)),a first counter electrode layer forming step S1201 (i.e., a step (b1)),and a first insulating portion folding step S1301 (i.e., a step (c1)).

The first electrode layer forming step S1101 is a step in which thefirst electrode layer 311 is formed in contact with the firstelectroconductive portion 111 by the electrode layer forming unit 410.

The first counter electrode layer forming step S1201 is a step in whichthe first counter electrode layer 312 is formed in contact with thesecond electroconductive portion 112 by the counter electrode layerforming unit 420.

The first insulating portion folding step S1301 is a step in which thefirst insulating portion 121 is folded by the current collector foldingunit 430.

The first insulating portion folding step S1301 is a step that isexecuted after the first electrode layer forming step S1101 and firstcounter electrode layer forming step S1201.

The first electrode layer 311 and first counter electrode layer 312 arepositioned facing each other, due to the first current collector 100being folded at the first insulating portion 121 by the currentcollector folding unit 430 in the first insulating portion folding stepS1301.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, first electrode layer 311 and first counter electrode layer 312 caneach be formed on the first electroconductive portion 111 and secondelectroconductive portion 112 that are linked to each other by the firstinsulating portion 121. Accordingly, the positional relationship betweenthe first electrode layer 311 disposed on the first electroconductiveportion 111 and the first counter electrode layer 312 disposed on thesecond electroconductive portion 112 can be strongly maintained by thefirst insulating portion 121 (in other words, by the first currentcollector 100 that is a single component member). Accordingly, thelayers (or cells) making up the battery can be prevented from exhibitingpositional shifting or separation due to shock, vibration, and so forth,when manufacturing the battery, for example. Thus, yield whenmanufacturing the battery can be improved.

The configurations illustrated as the first current collector 100 in theabove-described first and second embodiments may be used for theconfiguration of the first current collector 100 (e.g., materials,thicknesses, etc.) as appropriate.

FIG. 36 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus 3100 according to the third embodiment.

The battery manufacturing apparatus 3100 according to the thirdembodiment further has the following configuration, in addition to theconfiguration of the above-described battery manufacturing apparatus3000 according to the third embodiment.

That is to say, the battery manufacturing apparatus 3100 according tothe third embodiment is provided with a solid electrolyte layer formingunit 440.

The solid electrolyte layer forming unit 440 forms the first solidelectrolyte layer 313 on at least one of the first electrode layer 311and first counter electrode layer 312.

FIG. 37 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 37 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 35.

That is to say, the battery manufacturing method illustrated in FIG. 37further includes a first solid electrolyte layer forming step S1401(i.e., a step (f1)).

The first solid electrolyte layer forming step S1401 is a step in whichthe first solid electrolyte layer 313 is formed on at least one of thefirst electrode layer 311 and first counter electrode layer 312 by thesolid electrolyte layer forming unit 440.

According to the above configuration, a solid battery cell (firstpower-generating element 310) can be fabricated by a convenient foldingprocess. Thus, the first power-generating element 310 can be fabricatedwith suppressed positional deviation of the component members, ascompared with a case of using a process of laminating a great number ofindividual component members.

According to the above-described manufacturing apparatus ormanufacturing method, the battery 1000 according to the first embodimentcan be manufactured.

Note that the first current collector 100 may have the thirdelectroconductive portion 113 and second insulating portion 122.

The second insulating portion 122 is a member linking the secondelectroconductive portion 112 and third electroconductive portion 113.

The electrode layer forming unit 410 may form the second electrode layer321 in contact with the second electroconductive portion 112 at thistime.

The counter electrode layer forming unit 420 may form the second counterelectrode layer 322 in contact with the third electroconductive portion113. The second counter electrode layer 322 is a counter electrode ofthe second electrode layer 321.

FIG. 38 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 38 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 35.

That is to say, the battery manufacturing method illustrated in FIG. 38further includes a second electrode layer forming step S1102 (i.e., astep (a2)), a second counter electrode layer forming step S1202 (i.e., astep (b2)), and a second insulating portion folding step S1302 (i.e., astep (c2)).

The second electrode layer forming step S1102 is a step in which thesecond electrode layer 321 is formed in contact with the secondelectroconductive portion 112 by the electrode layer forming unit 410.

The second counter electrode layer forming step S1202 is a step in whichthe second counter electrode layer 322 is formed in contact with thethird electroconductive portion 113 by the counter electrode layerforming unit 420.

The second insulating portion folding step S1302 is a step in which thesecond insulating portion 122 is folded by the current collector foldingunit 430.

The second insulating portion folding step S1302 is a step that isexecuted after the second electrode layer forming step S1102 and secondcounter electrode layer forming step S1202.

The second electrode layer 321 and second counter electrode layer 322are positioned facing each other, due to the first current collector 100being folded at the second insulating portion 122 by the currentcollector folding unit 430 in the second insulating portion folding stepS1302.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, the second electrode layer 321 and second counter electrode layer322 can each be formed on the second electroconductive portion 112 andthird electroconductive portion 113 that are linked to each other by thesecond insulating portion 122. Accordingly, the positional relationshipbetween the second electrode layer 321 disposed on the secondelectroconductive portion 112 and the second counter electrode layer 322disposed on the third electroconductive portion 113 can be stronglymaintained by the second insulating portion 122 (in other words, by thefirst current collector 100 that is a single component member).Accordingly, the layers (e.g., second electrode layer 321 and secondcounter electrode layer 322) making up the battery can be prevented fromexhibiting positional shifting or separation due to shock, vibration,and so forth, when manufacturing the battery, for example.

According to the above configuration, a laminated battery, whereelectrodes having a bipolar structure have been laminated, can befabricated by a convenient folding process. That is to say, a laminatedbattery where power-generating elements are serially laminated can befabricated by the step of folding at the first insulating portion 121and second insulating portion 122 of the first current collector 100where bipolar-structure electrodes (e.g., electrodes fabricated by thesteps of forming the counter electrode layers and electrode layers onthe first current collector 100) have been provided. Thus, aserial-structure laminated battery can be fabricated more convenientlyand less expensively as compared to a case of using a process oflaminating multiple individually separated bipolar-structure electrodes,while suppressing positional deviation of the component members.

Note that the solid electrolyte layer forming unit 440 may form thesecond solid electrolyte layer 323 on at least one of the secondelectrode layer 321 and second counter electrode layer 322.

FIG. 39 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 39 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 38.

That is to say, the battery manufacturing method illustrated in FIG. 39further includes the above-described first solid electrolyte layerforming step S1401, and a second solid electrolyte layer forming stepS1402 (i.e., a step (f2)).

The second solid electrolyte layer forming step S1402 is a step in whichthe second solid electrolyte layer 323 is formed on at least one of thesecond electrode layer 321 and second counter electrode layer 322 by thesolid electrolyte layer forming unit 440.

According to the above configuration, the solid battery cells (firstpower-generating element 310 and second power-generating element 320)can be fabricated by a convenient folding process. Thus, a laminatedbattery where the multiple solid battery cells (first power-generatingelement 310 and second power-generating element 320) have been seriallylaminated can be fabricated with suppressed positional deviation of thecomponent members, as compared with a case of using a process oflaminating a great number of individual component members.

According to the above-described manufacturing apparatus ormanufacturing method, the battery 100 according to the first embodimentcan be manufactured.

Note that the first current collector 100 may have the fourthelectroconductive portion 114 and third insulating portion 123.

The third insulating portion 123 is a member linking the thirdelectroconductive portion 113 and fourth electroconductive portion 114.

The electrode layer forming unit 410 may form the third electrode layer331 in contact with the third electroconductive portion 113 at thistime.

The counter electrode layer forming unit 420 may form the third counterelectrode layer 332 in contact with the fourth electroconductive portion114. The third counter electrode layer 332 is a counter electrode of thethird electrode layer 331.

FIG. 40 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 40 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 38.

That is to say, the battery manufacturing method illustrated in FIG. 40further includes a third electrode layer forming step S1103 (i.e., astep (a3)), a third counter electrode layer forming step S1203 (i.e., astep (b3)), and a third insulating portion folding step S1303 (i.e., astep (c3)).

The third electrode layer forming step S1103 is a step in which thethird electrode layer 331 is formed in contact with the thirdelectroconductive portion 113 by the electrode layer forming unit 410.

The third counter electrode layer forming step S1203 is a step in whichthe third counter electrode layer 332 is formed in contact with thefourth electroconductive portion 114.

The third insulating portion folding step S1303 is a step in which thethird insulating portion 123 is folded by the current collector foldingunit 430.

The third insulating portion folding step S1303 is a step that isexecuted after the third electrode layer forming step S1103 and thirdcounter electrode layer forming step S1203.

The third electrode layer 331 and third counter electrode layer 332 arepositioned facing each other, due to the first current collector 100being folded at the third insulating portion 123 by the currentcollector folding unit 430 in the third insulating portion folding stepS1303.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, third electrode layer 331 and third counter electrode layer 332 caneach be formed on the third electroconductive portion 113 and fourthelectroconductive portion 114 that are linked to each other by the thirdinsulating portion 123. Accordingly, the positional relationship betweenthe third electrode layer 331 disposed on the third electroconductiveportion 113 and the third counter electrode layer 332 disposed on thefourth electroconductive portion 114 can be strongly maintained by thethird insulating portion 123 (in other words, by the first currentcollector 100 that is a single component member). Accordingly, thelayers (e.g., the third electrode layer 331 and third counter electrodelayer 332) making up the battery can be prevented from exhibitingpositional shifting or separation due to shock, vibration, and so forth,when manufacturing the battery, for example.

According to the above configuration, a laminated battery, whereelectrodes having a bipolar structure have been laminated, can befabricated by a convenient folding process. That is to say, a laminatedbattery where power-generating elements are serially laminated can befabricated by the step of folding at the first insulating portion 121,second insulating portion 122, and third insulating portion 123 of thefirst current collector 100 where bipolar-structure electrodes (e.g.,electrodes fabricated by the steps of forming the counter electrodelayers and electrode layers on the first current collector 100) havebeen provided. Thus, a serial-structure laminated battery can befabricated more conveniently and less expensively as compared to a caseof using a process of laminating multiple individually-separatedbipolar-structure electrodes, while suppressing positional deviation ofthe component members.

Note that the solid electrolyte layer forming unit 440 may form thesecond third solid electrolyte layer 333 on at least one of the thirdelectrode layer 331 and third counter electrode layer 332.

FIG. 41 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 41 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 39.

That is to say, the battery manufacturing method illustrated in FIG. 41further includes the above-described first solid electrolyte layerforming step S1401, the above-described second solid electrolyte layerforming step S1402, and a third solid electrolyte layer forming stepS1403 (i.e., a step (f3)).

The third solid electrolyte layer forming step S1403 is a step in whichthe third solid electrolyte layer 333 is formed on at least one of thethird electrode layer 331 and third counter electrode layer 332 by thesolid electrolyte layer forming unit 440.

According to the above configuration, the solid battery cells (firstpower-generating element 310, second power-generating element 320, andthird power-generating element 330) can be fabricated by a convenientfolding process. Thus, a laminated battery where the multiple solidbattery cells (i.e., first power-generating element 310, secondpower-generating element 320 and third power-generating element 330)have been serially laminated can be fabricated with suppressedpositional deviation of the component members, as compared with a caseof using a process of laminating a great number of individual componentmembers.

According to the above-described manufacturing apparatus ormanufacturing method, the battery 1200 according to the first embodimentcan be manufactured.

A specific example of the battery manufacturing method according to thethird embodiment will be described below.

First, an example of a first current collector preparation step S100will be described.

The first current collector preparation step S100 is a step encompassingthe first electrode layer forming step S1101, second electrode layerforming step S1102, third electrode layer forming step S1103, firstcounter electrode layer forming step S1201, second counter electrodelayer forming step S1202, and third counter electrode layer forming stepS1203, as illustrated in FIG. 40.

Note that the first current collector preparation step S100 may furtherencompass the first solid electrolyte layer forming step S1401, secondsolid electrolyte layer forming step S1402, and third solid electrolytelayer forming step S1403, as illustrated in FIG. 41.

FIG. 42 is a diagram illustrating a schematic configuration of anexample of the first current collector 100 according to the thirdembodiment.

Indicated by (a) in FIG. 42 is an x-z diagram (cross-sectional viewtaken along 42A in FIG. 42) illustrating a schematic configuration of anexample of the first current collector 100 according to the thirdembodiment.

Indicated by (b) in FIG. 42 is an x-y diagram (plan view) illustrating aschematic configuration of an example of the first current collector 100according to the third embodiment,

FIG. 43 is a diagram illustrating an example of the first electrodelayer forming step S1101, second electrode layer forming step S1102, andthird electrode layer forming step S1103.

The first electrode layer 311 and third electrode layer 331 are eachformed in contact with one principal face (e.g., the front face) of thefirst current collector 100, by the first electrode layer forming stepS1101 and third electrode layer forming step S1103 being performed.

The second electrode layer 321 is formed in contact with the otherprincipal face (e.g., the rear face) of the first current collector 100,by the second electrode layer forming step S1102 being performed.

The electrode layer forming unit 410 may apply a coating material (apaste-like coating agent, in which the electrode materials making up theelectrode layers have been kneaded with a solvent) on a principal faceof the first current collector 100 prepared beforehand. The coatingmaterial may then be dried. The coating material may be pressed afterdrying. This enables the density of the material of the electrode layersto be increased.

Note that the order in which the first electrode layer forming stepS1101, second electrode layer forming step S1102, and third electrodelayer forming step S1103 are executed may be optionally decided.

Thus, the electrode layers may be intermittently formed, having aregularity, on the principal face of the first current collector 100.For example, the electrode layers may be formed in rectangular regionsat predetermined intervals, as illustrated in FIG. 43.

FIG. 44 is a diagram illustrating an example of the first counterelectrode layer forming step S1201, second counter electrode layerforming step S1202, and third counter electrode layer forming stepS1203.

The first counter electrode layer 312 and third counter electrode layer332 are each formed in contact with one principal face (e.g., the frontface) of the first current collector 100, by the first counter electrodelayer forming step S1201 and third counter electrode layer forming stepS1203 being performed.

The second counter electrode layer 322 is formed in contact with theother principal face (e.g., the rear face) of the first currentcollector 100, by the second counter electrode layer forming step S1202being performed.

The counter electrode layer forming unit 420 may apply a coatingmaterial (i.e., a paste-like coating agent, in which the counterelectrode materials making up the counter electrode layers have beenkneaded with a solvent) on a principal face of the first currentcollector 100 prepared beforehand, for example. The coating material maythen be dried. The coating material may be pressed after drying. Thisenables the density of the material of the counter electrode layers tobe increased.

Note that the order in which the first counter electrode layer formingstep S1201, second counter electrode layer forming step S1202, and thirdcounter electrode layer forming step S1203 are executed may beoptionally decided.

Thus, the counter electrode layers may be intermittently formed, havinga regularity, on the principal face of the first current collector 100.For example, the counter electrode layers may be formed in rectangularregions at predetermined intervals, as illustrated in FIG. 44.

Note that the first counter electrode layer forming step S1201, secondcounter electrode layer forming step S1202, and third counter electrodelayer forming step S1203 may be executed before the first electrodelayer forming step S1101, second electrode layer forming step S1102, andthird electrode layer forming step S1103, or after.

FIG. 45 is a diagram illustrating an example of the first solidelectrolyte layer forming step S1401, second solid electrolyte layerforming step S1402, and third solid electrolyte layer forming stepS1403.

The solid electrolyte layer forming unit 440 may apply a coatingmaterial (i.e., a paste-like coating agent, in which the materialsmaking up the solid electrolyte layers have been kneaded with a solvent)on at least one of the counter electrode layers and the electrodelayers. The coating material may then be dried. The coating material maybe pressed after drying. This enables the density of the material of thesolid electrolyte layers to be increased.

Note that in the first solid electrolyte layer forming step S1401, thefirst solid electrolyte layer 313 may be formed over a greater area thanthe first electrode layer 311 and third electrode layer 331, asillustrated in FIG. 45. Accordingly, the first solid electrolyte layer313 can be disposed in contact with the first electroconductive portion111 and second electroconductive portion 112.

Also, in the second solid electrolyte layer forming step S1402, thesecond solid electrolyte layer 323 may be formed over a greater areathan the second electrode layer 321 and second counter electrode layer322, as illustrated in FIG. 45. Accordingly, the second solidelectrolyte layer 323 can be disposed in contact with the secondelectroconductive portion 112 and third electroconductive portion 113.

Also, in the third solid electrolyte layer forming step S1403, the thirdsolid electrolyte layer 333 may be formed over a greater area than thethird electrode layer 331 and third counter electrode layer 332, asillustrated in FIG. 45. Accordingly, the third solid electrolyte layer333 can be disposed in contact with third electroconductive portion 113and fourth electroconductive portion 114.

Note that the order in which the first solid electrolyte layer formingstep S1401, second solid electrolyte layer forming step S1402, and thirdsolid electrolyte layer forming step S1403 are executed may beoptionally decided.

Note that the solid electrolyte layers may be formed on both theelectrode layers and counter electrode layers due to the solidelectrolyte layer forming steps being executed, as illustrated in FIG.45. In this case, the solid electrolyte layer forming steps are executedafter the electrode layer forming steps and counter electrode layerforming steps.

FIGS. 46A through 46C are x-z diagrams cross-sectional views)illustrating schematic configurations of the first current collector 100where electrode layers, counter electrode layers, and solid electrolytelayers have been formed.

The solid electrolyte layers may be formed only on the electrode layersdue to the solid electrolyte layer forming steps being executed, asillustrated in FIG. 46A, In this case, the solid electrolyte layerforming steps are executed after the electrode layer forming steps.

Alternatively, the solid electrolyte layers may be formed only on thecounter electrode layers due to the solid electrolyte layer formingsteps being executed, as illustrated in FIG. 46B. In this case, thesolid electrolyte layer forming steps are executed after counterelectrode layer forming steps.

Alternatively, the solid electrolyte layers may be formed on both theelectrode layers and counter electrode layers, and moreover upon theelectroconductive portions and the insulating portions, due to the solidelectrolyte layer forming steps being executed, as illustrated in FIG.46C. In this case, the solid electrolyte layer forming steps areexecuted after the electrode layer forming steps and counter electrodelayer forming steps. Thus, the solid electrolyte layers can beconsecutively formed. Accordingly, the steps of forming the solidelectrolyte layers can be further simplified. Moreover, in a case wherethe material making up the first solid electrolyte layer 313 and thethird solid electrolyte layer 333 is the same (i.e., the coatingmaterial to become the first solid electrolyte layer 313 and the thirdsolid electrolyte layer 333 is the same), the first solid electrolytelayer forming step S1401 and third solid electrolyte layer forming stepS1403 may be executed consecutively. This enables the steps for formingthe solid electrolyte layers to be further simplified.

In a case where the solid electrolyte layers are non-continuouslyformed, as illustrated in FIGS. 46A and 46B, the amount of materialbeing coated can be reduced. Further, by not coating the solidelectrolyte layers on the insulating portions, cracks occur less readilyin the solid electrolyte layers when folding at the insulating portions.

FIG. 47 is an x-z diagram (cross-sectional view) illustrating an exampleof the first insulating portion folding step S1301, second insulatingportion folding step S1302, and third insulating portion folding stepS1303.

The current collector folding unit 430 may have a first folding member611, a second folding member 612, and a third folding member 613 (e.g.,rod members, wire members, etc.), for example. The current collectorfolding unit 430 may at this time apply the folding members against theinsulating portions, and move at least one of the first currentcollector 100 and the folding members, thereby folding at the insulatingportion.

The order of executing the first insulating portion folding step S1301,second insulating portion folding step S1302, and third insulatingportion folding step S1303 may be optionally decided.

For example, first insulating portion folding step S1301, secondinsulating portion folding step S1302, and third insulating portionfolding step S1303 may be executed at the same time, as illustrated inFIG. 47.

FIG. 48 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus 3200 according to the third embodiment.

The battery manufacturing apparatus 3200 according to the thirdembodiment further has, in addition to the configuration of theabove-described battery manufacturing apparatus 3000 according to thethird embodiment, the following configuration.

That is to say, the battery manufacturing apparatus 3200 according tothe third embodiment further includes an overhang portion forming unit450.

The overhang portion forming unit 450 forms the first overhang portion121 a, second overhang portion 122 a (or second overhang portion 122 b),and third overhang portion 123 a.

FIG. 49 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 49 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIGS. 40 and 41.

That is to say, the battery manufacturing method illustrated in FIG. 49further includes a first overhang portion forming step S1501 (i.e., astep (d1)), a second overhang portion forming step S1502 (i.e., a step(d2)), and a third overhang portion forming step S1503 (i.e., a step(d3)).

The first overhang portion forming step S1501 is a step executed afterthe first insulating portion folding step S1301. The first overhangportion forming step S1501 is a step in which a portion of the firstinsulating portion 121 is caused to overhang from the secondelectroconductive portion 112 toward the side where the second electrodelayer 321 is disposed, thereby forming the first overhang portion 121 aby the overhang portion forming unit 450.

According to the above configuration, the side faces of componentmembers situated toward the side where the second electrode layer 321 isdisposed from the second electroconductive portion 112 (e.g., secondelectrode layer 321, second counter electrode layer 322, second solidelectrolyte layer 323, etc.) can be covered by the first overhangportion 121 a of the first insulating portion 121. Accordingly, aconfiguration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the first insulating portion 121) are separatelyattached, while suppressing positional deviation of the componentmembers.

The second overhang portion forming step S1502 is a step executed afterthe second insulating portion folding step S1302. The second overhangportion forming step S1502 is a step in which a portion of the secondinsulating portion 122 is caused by the overhang portion forming unit450 to overhang from the second electroconductive portion 112 toward theside where the first counter electrode layer 312 is disposed, therebyforming the second overhang portion 122 a.

According to the above configuration, the side faces of componentmembers situated toward the side where the first counter electrode layer312 is disposed from the second electroconductive portion 112 (e.g.,first electrode layer 311, first counter electrode layer 312, firstsolid electrolyte layer 313, etc.) can be covered by the second overhangportion 122 a of the second insulating portion 122. Accordingly, aconfiguration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the second insulating portion 122) are separatelyattached, while suppressing positional deviation of the componentmembers.

Alternatively, the second overhang portion forming step S1502 may be astep in which a portion of the second insulating portion 122 is causedby the overhang portion forming unit 450 to overhang from the thirdelectroconductive portion 113 toward the side where the third electrodelayer 331 is disposed, thereby forming the second overhang portion 122b.

According to the above configuration, the side faces of componentmembers situated toward the side where the third electrode layer 331 isdisposed from the third electroconductive portion 113 (e.g., thirdelectrode layer 331, third counter electrode layer 332, third solidelectrolyte layer 333, etc.) can be covered by the second overhangportion 122 b of the second insulating portion 122. Accordingly, aconfiguration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the second insulating portion 122) are separatelyattached, while suppressing positional deviation of the componentmembers.

The third overhang portion forming step S1503 is a step executed afterthe third insulating portion folding step S1303. The third overhangportion forming step S1503 is a step in which a portion of the thirdinsulating portion 123 is caused by the overhang portion forming unit450 to overhang from the third electroconductive portion 113 toward theside where the second counter electrode layer 322 is disposed, therebyforming the third overhang portion 123 a.

According to the above configuration, the side faces of componentmembers situated toward the side where the second counter electrodelayer 322 is disposed from the third electroconductive portion 113(e.g., second electrode layer 321, second counter electrode layer 322,second solid electrolyte layer 323, etc.) can be covered by the thirdoverhang portion 123 a of the third insulating portion 123. Accordingly,a configuration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the third insulating portion 123) are separatelyattached, while suppressing positional deviation of the componentmembers.

Note that order of executing the first overhang portion forming stepS1501, second overhang portion forming step S1502, and third overhangportion forming step S1503 may be optionally decided.

The overhang portion forming unit 450 may have overhang portion formingmembers (e.g., pressing plate, roller, etc.), for example, the overhangportion forming unit 450 may form the overhang portions by pressing theoverhang portion forming members against the insulating portions. Forexample, the battery 1300 according to the first embodiment may bemanufactured by pressing the insulating portions by the overhang portionforming members. Alternatively, the battery 1400 according to the firstembodiment may be manufactured by pressing the insulating members by theoverhang portion forming members (e.g., moving the overhang portionforming members) from the side where the first electroconductive portion111 is situated toward the side where the fourth electroconductiveportion 114 is situated, for example. Alternatively, the battery 1500according to the first embodiment may be manufactured by pressing theinsulating members by the overhang portion forming members (e.g., movingthe overhang portion forming members) from the side where the fourthelectroconductive portion 114 is situated toward the side where thefirst electroconductive portion 111 is situated, for example.

Note that the first insulating portion 121 and third insulating portion123 may come into contact with each other, due to at least one of thefirst overhang portion forming step S1501 and the third overhang portionforming step S1503 having been performed.

According to the above configuration, the side faces of componentmembers interposed between the second electroconductive portion 112 andthird electroconductive portion 113 (e.g., second electrode layer 321,second counter electrode layer 322, second solid electrolyte layer 323,etc.) can be covered by at least one of the first insulating portion 121and third insulating portion 123. That is to say, a configuration whereside faces of the battery are covered can be realized more convenientlyand less expensively as compared to a case of using a process whereindividual insulating members (i.e., members different from the firstinsulating portion 121 and third insulating portion 123) are separatelyattached, while suppressing positional deviation of the componentmembers.

Note that the first overhang portion 121 a and third overhang portion123 a may be formed in the first overhang portion forming step S1501 andthird overhang portion forming step S1503, and the first insulatingportion 121 and third insulating portion 123 may come into contact witheach other by the first overhang portion 121 a and third overhangportion 123 a coming into contact with each other (e.g., FIG. 10).

Alternatively, the first overhang portion 121 a may be formed in thefirst overhang portion forming step S1501, and first insulating portion121 and third insulating portion 123 may come into contact with eachother by the first overhang portion 121 a and third insulating portion123 coming into contact with each other (e.g., FIG. 11).

Alternatively, the third overhang portion 123 a may be formed in thethird overhang portion forming step S1503, and first insulating portion121 and third insulating portion 123 may come into contact with eachother by the first insulating portion 121 and third overhang portion 123a coming into contact with each other (e.g., FIG. 12).

FIG. 50 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus 3300 according to the third embodiment.

The battery manufacturing apparatus 3300 according to the thirdembodiment further has, in addition to the configuration of theabove-described battery manufacturing apparatus 3000 according to thethird embodiment, the following configuration.

That is to say, the battery manufacturing apparatus 3300 according tothe third embodiment further includes an insulating portion shrinkingunit 460.

The insulating portion shrinking unit 460 serves to shrink the firstinsulating portion 121, second insulating portion 122, and thirdinsulating portion 123.

FIG. 51 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 51 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIGS. 40 and 41.

That is to say, the battery manufacturing method illustrated in FIG. 51further includes a first insulating portion shrinking step S1601 (i.e.,a step (e1)), a second insulating portion shrinking step S1602 (i.e., astep (e2)), and a third insulating portion shrinking step S1603 (i.e., astep (e3)).

The first insulating portion shrinking step S1601 is a step executedafter the first insulating portion folding step S1301. The firstinsulating portion shrinking step S1601 is a step in which the firstinsulating portion 121 is shrunk by the insulating portion shrinkingunit 460.

According to the above configuration, the first insulating portion 121is shrunk, whereby the bonding among the component members of thebattery can be made stronger by the first insulating portion 121.

The second insulating portion shrinking step S1602 is a step executedafter the second insulating portion folding step S1302. The secondinsulating portion shrinking step S1602 is a step in which the secondinsulating portion 122 is shrunk by the insulating portion shrinkingunit 460.

According to the above configuration, the second insulating portion 122is shrunk, whereby the bonding among the component members of thebattery can be made stronger by the second insulating portion 122.

The third insulating portion shrinking step S1603 is a step executedafter the third insulating portion folding step S1303. The thirdinsulating portion shrinking step S1603 is a step in which the thirdinsulating portion 123 is shrunk by the insulating portion shrinkingunit 460.

According to the above configuration, the third insulating portion 123is shrunk, whereby the bonding among the component members of thebattery can be made stronger by the third insulating portion 123.

FIG. 52 is an x-z diagram (cross-sectional view) illustrating an exampleof the first insulating portion shrinking step S1601, second insulatingportion shrinking step S1602, and third insulating portion shrinkingstep S1603.

The insulating portion shrinking unit 460 may include insulating portionshrinking members (e.g., heating device, etc.), for example. Theinsulating portions may include thermal-shrinking material. Theinsulating portion shrinking unit 460 may heat the insulating portionsby the heating device to cause the thermal-shrinking material to shrinkat this time, thereby shrinking the insulating portions.

Note that the order of executing the first insulating portion shrinkingstep S1601, second insulating portion shrinking step S1602, and thirdinsulating portion shrinking step S1603 may be optionally decided.

For example, the first insulating portion shrinking step S1601, secondinsulating portion shrinking step S1602, and third insulating portionshrinking step S1603 may be executed at the same time, as illustrated inFIG. 52.

FIG. 53 is a diagram illustrating a schematic configuration of a batterymanufacturing apparatus 3400 according to the third embodiment.

The battery manufacturing apparatus 3400 according to the thirdembodiment further has, in addition to the configuration of theabove-described battery manufacturing apparatus 3100 according to thethird embodiment, the following configuration.

That is to say, the battery manufacturing apparatus 3400 according tothe third embodiment further includes a laminating unit 470.

The laminating unit 470 laminates the first current collector 100 andsecond current collector 200.

The second current collector 200 includes the fifth electroconductiveportion 211. The second current collector 200 may also further includethe sixth electroconductive portion 212, seventh electroconductiveportion 213, fourth insulating portion 221, fifth insulating portion222, and sixth insulating portion 223.

The fourth insulating portion 221 is a member linking the fifthelectroconductive portion 211 and sixth electroconductive portion 212.

The fifth insulating portion 222 is a member linking the sixthelectroconductive portion 212 and seventh electroconductive portion 213.

The sixth insulating portion 223 is a member linked to the seventhelectroconductive portion 213.

FIG. 54 is a diagram illustrating a schematic configuration of anexample of the second current collector 200 according to the thirdembodiment.

Indicated by (a) in FIG. 54 is an x-z diagram (cross-sectional viewtaken along 54 in FIG. 54) illustrating a schematic configuration of anexample of the second current collector 200 according to the thirdembodiment.

Indicated by (b) in FIG. 54 is an x-y diagram (plan view) illustrating aschematic configuration of an example of the second current collector200 according to the third embodiment.

The electrode layer forming unit 410 may form the fourth electrode layer315 in contact with the fifth electroconductive portion 211. Theelectrode layer forming unit 410 may form the fifth electrode layer 325in contact with the sixth electroconductive portion 212. The electrodelayer forming unit 410 may form the sixth electrode layer 335 in contactwith the seventh electroconductive portion 213.

Also, the counter electrode layer forming unit 420 may form the fourthcounter electrode layer 314 in contact with the fifth electroconductiveportion 211. The counter electrode layer forming unit 420 may form thefifth counter electrode layer 324 in contact with the sixthelectroconductive portion 212. The counter electrode layer forming unit420 may form the sixth counter electrode layer 334 in contact with theseventh electroconductive portion 213, Note that the fourth counterelectrode layer 314, fifth counter electrode layer 324, and sixthcounter electrode layer 334 are counter electrodes of the firstelectrode layer 311, second electrode layer 321, third electrode layer331, fourth electrode layer 315, fifth electrode layer 325, and sixthelectrode layer 335.

FIG. 55 is a diagram illustrating an example of a second currentcollector preparation step S200.

The second current collector preparation step S200 encompasses a fourthelectrode layer forming step 2101 (i.e., a step (a4)) and a fourthcounter electrode layer forming step S2201 (i.e., a step (b4)).

The fourth electrode layer forming step 2101 is a step in which thefourth electrode layer 315 is formed in contact with the fifthelectroconductive portion 211 by the electrode layer forming unit 410.

The fourth counter electrode layer forming step S2201 is a step in whichthe fourth counter electrode layer 314 is formed in contact with thefifth electroconductive portion 211 by the counter electrode layerforming unit 420.

Note that the second current collector preparation step S200 may furtherencompass a fifth electrode layer forming step 2102 (i.e., step (a5)), asixth electrode layer forming step 2103 (i.e., step (a6)), a fifthcounter electrode layer forming step S2202 (i.e., step (b5)), and asixth counter electrode layer forming step S2203 (i.e., step (b6)).

The fifth electrode layer forming step 2102 is a step in which the fifthelectrode layer 325 is formed in contact with the sixthelectroconductive portion 212 by the electrode layer forming unit 410.

The sixth electrode layer forming step 2103 is a step in which the sixthelectrode layer 335 is formed in contact with the seventhelectroconductive portion 213 by the electrode layer forming unit 410.

The fifth counter electrode layer forming step S2202 is a step in whichthe fifth counter electrode layer 324 is formed in contact with thesixth electroconductive portion 212 by the counter electrode layerforming unit 420.

The sixth counter electrode layer forming step S2203 is a step in whichthe sixth counter electrode layer 334 is formed in contact with theseventh electroconductive portion 213 by the counter electrode layerforming unit 420.

As for specific methods of the steps for forming the electrode layers onthe second current collector 200, methods described as methods forforming the electrode layers on the first current collector 100 may beemployed as appropriate.

As for specific methods of the steps for forming the counter electrodelayers on the second current collector 200, methods described as methodsfor forming the counter electrode layers on the first current collector100 may be employed as appropriate.

Note that the solid electrolyte layer forming unit 440 may form thefirst solid electrolyte layer 313 on at least one of the first electrodelayer 311 and fourth counter electrode layer 314. The solid electrolytelayer forming unit 440 may form the second solid electrolyte layer 323on at least one of the second electrode layer 321 and fifth counterelectrode layer 324. The solid electrolyte layer forming unit 440 mayform the third solid electrolyte layer 333 on at least one of the thirdelectrode layer 331 and sixth counter electrode layer 334. The solidelectrolyte layer forming unit 440 may form the fourth solid electrolytelayer 316 on at least one of the fourth electrode layer 315 and firstcounter electrode layer 312. The solid electrolyte layer forming unit440 may form the fifth solid electrolyte layer 326 on at least one ofthe fifth electrode layer 325 and second counter electrode layer 322.The solid electrolyte layer forming unit 440 may form the sixth solidelectrolyte layer 336 on at least one of the sixth electrode layer 335and third counter electrode layer 332.

In other words, the second current collector preparation step S200 mayfurther encompass a first solid electrolyte layer forming step S2401(i.e., a step (g1)), a second solid electrolyte layer forming step S2402(i.e., a step (g2)), a third solid electrolyte layer forming step S2403(i.e., a step (g3)), a fourth solid electrolyte layer forming step S2404(i.e., a step (g4)), a fifth solid electrolyte layer forming step S2405(i.e., a step (g5)), and a sixth solid electrolyte layer forming stepS2406 (i.e., a step (g6)), as illustrated in FIG. 55.

The first solid electrolyte layer forming step S2401 is a step in whichthe first solid electrolyte layer 313 is formed on at least one of thefirst electrode layer 311 and fourth counter electrode layer 314 by thesolid electrolyte layer forming unit 440.

The second solid electrolyte layer forming step S2402 is a step in whichthe second solid electrolyte layer 323 is formed on at least one of thesecond electrode layer 321 and fifth counter electrode layer 324 by thesolid electrolyte layer forming unit 440.

The third solid electrolyte layer forming step S2403 is a step in whichthe third solid electrolyte layer 333 is formed on at least one of thethird electrode layer 331 and sixth counter electrode layer 334 by thesolid electrolyte layer forming unit 440.

The fourth solid electrolyte layer forming step S2404 is a step in whichthe fourth solid electrolyte layer 316 is formed on at least one of thefourth electrode layer 315 and first counter electrode layer 312 by thesolid electrolyte layer forming unit 440.

The fifth solid electrolyte layer forming step S2405 is a step in whichthe fifth solid electrolyte layer 326 is formed on at least one of thefifth electrode layer 325 and second counter electrode layer 322 by thesolid electrolyte layer forming unit 440.

The sixth solid electrolyte layer forming step S2406 is a step in whichthe sixth solid electrolyte layer 336 is formed on at least one of thesixth electrode layer 335 and third counter electrode layer 332 by thesolid electrolyte layer forming unit 440.

According to the above configuration, the respective solid battery cells(the respective power-generating elements) can be fabricated by aconvenient folding process. Thus, a laminated battery where multiplesolid battery cells are serially laminated can be fabricated withsuppressed positional deviation of the component members, as comparedwith a case of using a process of laminating a great number ofindividual component members.

As for specific methods of the steps for forming the solid electrolytelayers on the second current collector 200, methods described as methodsfor forming the solid electrolyte layers on the first current collector100 may be employed as appropriate.

FIG. 56 is a cross-sectional view illustrating an example of acombination of the first current collector 100 and second currentcollector 200.

As illustrated in FIG. 56, the solid electrolyte layers may be formed onall electrode layers and counter electrode layers on the first currentcollector 100 and second current collector 200.

FIG. 57 is a cross-sectional view illustrating an example of acombination of the first current collector 100 and second currentcollector 200.

As illustrated in FIG. 57, the solid electrolyte layers may becontinuously formed on all electrode layers and counter electrode layerson the first current collector 100 and second current collector 200.That is to say, the solid electrolyte layers may be formed on theinsulating portions on the first current collector 100 and secondcurrent collector 200 as well.

FIG. 58 is a cross-sectional view illustrating an example of acombination of the first current collector 100 and second currentcollector 200.

As illustrated in FIG. 58, the solid electrolyte layers may be formedonly on the electrode layers and counter electrode layers on the firstcurrent collector 100, without being formed on the electrode layers andcounter electrode layers on the second current collector 200.

FIG. 59 is a cross-sectional view illustrating an example of acombination of the first current collector 100 and second currentcollector 200.

As illustrated in FIG. 59, the solid electrolyte layers may be formedonly on the electrode layers and counter electrode layers on the secondcurrent collector 200, without being formed on the electrode layers andcounter electrode layers on the first current collector 100.

FIG. 60 is a cross-sectional view illustrating an example of acombination of the first current collector 100 and second currentcollector 200.

As illustrated in FIG. 60, the solid electrolyte layers may be formedonly on the electrode layers on the first current collector 100 andsecond current collector 200, without being formed on the counterelectrode layers on the first current collector 100 and second currentcollector 200.

FIG. 61 is a cross-sectional view illustrating an example of acombination of the first current collector 100 and second currentcollector 200.

As illustrated in FIG. 61, the solid electrolyte layers may be formed onthe counter electrode layers on the first current collector 100 andsecond current collector 200, without being formed on the electrodelayers on the first current collector 100 and second current collector200.

FIG. 62 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 62 includes thefirst current collector preparation step S100, the second currentcollector preparation step 1200, a first laminating step S1700 (i.e., astep (s1)), and the first insulating portion folding step S1301.

The laminating step S1700 is a step in which the first current collector100 and second current collector 200 are laminated by the laminatingunit 470 with the fourth counter electrode layer 314 and first electrodelayer 311 facing each other.

The first insulating portion folding step S1301 is executed after thelaminating step S1700.

The fourth electrode layer 315 and first counter electrode layer 312 arepositioned facing each other, due to the first current collector 100being folded at the first insulating portion 121 by the currentcollector folding unit 430 in the first insulating portion folding step.

According to the above configuration, a laminated battery wherebipolar-structure electrodes are laminated can be fabricated by aconvenient folding process. That is to say, a laminated battery wherethe power-generating elements have been serially laminated can befabricated by a step of folding the first insulating portion 121 suchthat the second current collector 200 where bipolar-structure electrodes(i.e., the electrodes fabricated in the steps of forming the fourthcounter electrode layer 314 and fourth electrode layer 315 on the fifthelectroconductive portion 211) have been provided is sandwiched by thefirst current collector 100. Accordingly, a serial-structure laminatedbattery can be fabricated more conveniently and less expensively ascompared to a case of using a process of laminating multiplebipolar-structure electrodes that have been individually separated,while suppressing positional deviation of the component members.

According to the above manufacturing apparatus and manufacturing method,the battery 2000 according to the second embodiment can be manufactured.

FIG. 63 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 63 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 62.

That is to say, the battery manufacturing method illustrated in FIG. 63further includes a fourth insulating portion folding step S2301 (i.e., astep (c4)).

The fourth insulating portion folding step S2301 is a step executedafter the first insulating portion folding step S1301. The fourthinsulating portion folding step S2301 is a step where the fourthinsulating portion 221 is folded by the current collector folding unit430.

The second electrode layer 321 and fifth counter electrode layer 324 arepositioned facing each other, due to the second current collector 200being folded at the fourth insulating portion 221 by the currentcollector folding unit 430 in the fourth insulating portion folding stepS2301.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, the fourth electrode layer 315 and fifth counter electrode layer324 can each be formed on the fifth electroconductive portion 211 andsixth electroconductive portion 212 that are linked to each other by thefourth insulating portion 221. Accordingly, the positional relationshipbetween the fourth electrode layer 315 disposed on the fifthelectroconductive portion 211 and the fifth counter electrode layer 324disposed on the sixth electroconductive portion 212 can be stronglymaintained by the fourth insulating portion 221 (in other words, by thesecond current collector 200 that is a single component member).Accordingly, the layers (e.g., the fourth electrode layer 315 and fifthcounter electrode layer 324) making up the battery can be prevented fromexhibiting positional shifting or separation due to shock, vibration,and so forth, when manufacturing the battery, for example.

According to the above configuration, a laminated battery wherebipolar-structure electrodes are laminated can be fabricated by aconvenient folding process. That is to say, a laminated battery wherethe power-generating elements have been serially laminated can befabricated by a step of folding the first insulating portion 121 of thefirst current collector 100 where bipolar-structure electrodes have beenprovided, and the fourth insulating portion 221 of the second currentcollector 200 where bipolar-structure electrodes have been provided.Accordingly, a serial-structure laminated battery can be fabricated moreconveniently and less expensively as compared to a case of using aprocess of laminating multiple bipolar-structure electrodes that havebeen individually separated, while suppressing positional deviation ofthe component members.

According to the above manufacturing apparatus and manufacturing method,the battery 2100 according to the second embodiment can be manufactured.

FIG. 64 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 64 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 63.

That is to say, the battery manufacturing method illustrated in FIG. 64further includes the second insulating portion folding step S1302.

The second insulating portion folding step S1302 is executed after thefourth insulating portion folding step S2301.

The fifth electrode layer 325 and second counter electrode layer 322 arepositioned facing each other, due to the first current collector 100being folded at the second insulating portion 122 by the currentcollector folding unit 430 in the second insulating portion folding stepS1302.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, the second electrode layer 321 and second counter electrode layer322 can each be formed on the second electroconductive portion 112 andthird electroconductive portion 113 that are linked to each other by thesecond insulating portion 122. Accordingly, the positional relationshipbetween the second electrode layer 321 disposed on the secondelectroconductive portion 112 and the second counter electrode layer 322disposed on the third electroconductive portion 113 can be stronglymaintained by the second insulating portion 122 (in other words, by thefirst current collector 100 that is a single component member).Accordingly, the layers (e.g., the second electrode layer 321 and secondcounter electrode layer 322) making up the battery can be prevented fromexhibiting positional shifting or separation due to shock, vibration,and so forth, when manufacturing the battery, for example.

According to the above configuration, a laminated battery wherebipolar-structure electrodes are laminated can be fabricated by aconvenient folding process. That is to say, a laminated battery wherethe power-generating elements have been serially laminated can befabricated by a step of folding the first insulating portion 121 andsecond insulating portion 122 of the first current collector 100 wherebipolar-structure electrodes have been provided, and the fourthinsulating portion 221 of the second current collector 200 wherebipolar-structure electrodes have been provided. Accordingly, aserial-structure laminated battery can be fabricated more convenientlyand less expensively as compared to a case of using a process oflaminating multiple bipolar-structure electrodes that have beenindividually separated, while suppressing positional deviation of thecomponent members.

According to the above manufacturing apparatus and manufacturing method,the battery 2200 according to the second embodiment can be manufactured.

FIG. 65 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 65 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 64.

That is to say, the battery manufacturing method illustrated in FIG. 65further includes a fifth insulating portion folding step S2302 (i.e., astep (c5)).

The fifth insulating portion folding step S2302 is executed after thesecond insulating portion folding step S1302.

The third electrode layer 331 and sixth counter electrode layer 334 arepositioned facing each other, due to the second current collector 200being folded at the fifth insulating portion 222 by the currentcollector folding unit 430 in the fifth insulating portion folding stepS2302.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, the fifth electrode layer 325 and sixth counter electrode layer 334can each be formed on the sixth electroconductive portion 212 andseventh electroconductive portion 213 that are linked to each other bythe fifth insulating portion 222. Accordingly, the positionalrelationship between the fifth electrode layer 325 disposed on the sixthelectroconductive portion 212 and the sixth counter electrode layer 334disposed on the seventh electroconductive portion 213 can be stronglymaintained by the fifth insulating portion 222 (in other words, by thesecond current collector 200 that is a single component member).Accordingly, the layers (e.g., the fifth electrode layer 325 and sixthcounter electrode layer 334) making up the battery can be prevented fromexhibiting positional shifting or separation due to shock, vibration,and so forth, when manufacturing the battery, for example.

According to the above configuration, a laminated battery wherebipolar-structure electrodes are laminated can be fabricated by aconvenient folding process. That is to say, a laminated battery wherethe power-generating elements have been serially laminated can befabricated by a step of folding the first insulating portion 121 andsecond insulating portion 122 of the first current collector 100 wherebipolar-structure electrodes have been provided, and the fourthinsulating portion 221 and fifth insulating portion 222 of the secondcurrent collector 200 where bipolar-structure electrodes have beenprovided. Accordingly, a serial-structure laminated battery can befabricated more conveniently and less expensively as compared to a caseof using a process of laminating multiple bipolar-structure electrodesthat have been individually separated, while suppressing positionaldeviation of the component members.

According to the above manufacturing apparatus and manufacturing method,the battery 2300 according to the second embodiment can be manufactured.

FIG. 66 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 66 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 65.

That is to say, the battery manufacturing method illustrated in FIG. 66further includes the third insulating portion folding step S1303.

The third insulating portion folding step S1303 is executed after thefifth insulating portion folding step S2302.

The sixth electrode layer 335 and third counter electrode layer 332 arepositioned facing each other, due to the first current collector 100being folded at the third insulating portion 123 by the currentcollector folding unit 430 in the third insulating portion folding stepS1303.

According to the above configuration, the bonding strength among thecomponent members of the battery can be further improved. That is tosay, the third electrode layer 331 and third counter electrode layer 332can each be formed on the third electroconductive portion 113 and fourthelectroconductive portion 114 that are linked to each other by the thirdinsulating portion 123. Accordingly, the positional relationship betweenthe third electrode layer 331 disposed on the third electroconductiveportion 113 and the third counter electrode layer 332 disposed on thefourth electroconductive portion 114 can be strongly maintained by thethird insulating portion 123 (in other words, by the first currentcollector 100 that is a single component member). Accordingly, thelayers (e.g., the third electrode layer 331 and third counter electrodelayer 332) making up the battery can be prevented from exhibitingpositional shifting or separation due to shock, vibration, and so forth,when manufacturing the battery, for example.

According to the above configuration, a laminated battery wherebipolar-structure electrodes are laminated can be fabricated by aconvenient folding process. That is to say, a laminated battery wherethe power-generating elements have been serially laminated can befabricated by a step of folding the first insulating portion 121, secondinsulating portion 122, and third insulating portion 123 of the firstcurrent collector 100 where bipolar-structure electrodes have beenprovided, and the fourth insulating portion 221 and fifth insulatingportion 222 of the second current collector 200 where bipolar-structureelectrodes have been provided. Accordingly, a serial-structure laminatedbattery can be fabricated more conveniently and less expensively ascompared to a case of using a process of laminating multiplebipolar-structure electrodes that have been individually separated,while suppressing positional deviation of the component members.

According to the above manufacturing apparatus and manufacturing method,the battery 2400 according to the second embodiment can be manufactured.

FIGS. 67A through 67J are x-y views (plan views) illustrating an exampleof the laminating step S1700 and the insulating portion folding steps.

The first current collector 100 and second current collector 200 arelaminated by the above-described battery manufacturing methodillustrated in FIG. 66 being carried out. For example, the first currentcollector 100 and second current collector 200 are laid out orthogonallyas illustrated in FIG. 67A, and laminated, Thereafter, the insulatingportions of the first current collector 100 and the insulating portionsof the second current collector 200 are alternately folded. Accordingly,the laminated-structure battery illustrated in FIG. 67G (the battery2300 according to the second embodiment) is obtained.

Further, in the example illustrated in FIGS. 67A through 67J, the firstcurrent collector 100 and second current collector 200 have furtherelectroconductive portion and insulating portion and power-generatingelement members (electrode layers, counter electrode layers, and solidelectrolyte layers). Thus, the folding can be continued, as illustratedin FIGS. 67H through 67J. Accordingly, a battery where a greater numberof power-generating elements have been laminated than the battery 2300according to the second embodiment can be fabricated.

Note that the shape of the electroconductive portions (and the formationranges of electrode layers, counter electrode layers, and solidelectrolyte layers) may be square, as illustrated in FIGS. 67A through67J.

FIGS. 68A and 68B are x-y views (plan views) illustrating an example oflaminating the first current collector 100 and second current collector200.

The shape of the electroconductive portions (and the formation ranges ofelectrode layers, counter electrode layers, and solid electrolytelayers) may be rectangular, as illustrated in FIG. 68. Thus, usingshapes that are not squares (e.g., rectangles) for the shapes of theelectroconductive portions allows the shapes of the laminated batteryformed by these being laminated, to be optionally designed.

Note that the overhang portion forming unit 450 may form the fourthoverhang portion and fifth overhang portion.

FIG. 69 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 69 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 66.

That is to say, the battery manufacturing method illustrated in FIG. 69further includes a fourth overhang portion forming step S2501 (i.e., astep (d4)), and a fifth overhang portion forming step S2502 (i.e., astep (d5)).

The fourth overhang portion forming step S2501 is a step executed afterthe fourth insulating portion folding step S2301. The fourth overhangportion forming step S2501 is a step in which a portion of the fourthinsulating portion 221 is caused by the overhang portion forming unit450 to overhang from the fifth electroconductive portion 211 to the sidewhere the fourth counter electrode layer 314 is disposed, therebyforming the fourth overhang portion 221 a.

According to the above configuration, the side faces of componentmembers situated toward the side where the fourth counter electrodelayer 314 is disposed from the fifth electroconductive portion 211(e.g., power-generating element 310 a, first electroconductive portion111, etc.) can be covered by the fourth overhang portion 221 a of thefourth insulating portion 221. That is to say, a configuration whereside faces of the battery are covered can be realized more convenientlyand less expensively as compared to a case of using a process whereindividual insulating members (i.e., members different from the fourthinsulating portion 221) are separately attached, while suppressingpositional deviation of the component members.

Alternatively, the fourth overhang portion forming step S2501 is a stepin which a portion of the fourth insulating portion 221 is caused by theoverhang portion forming unit 450 to overhang from the sixthelectroconductive portion 212 to the side where the fifth electrodelayer 325 is disposed, thereby forming the fourth overhang portion 221b.

According to the above configuration, the side faces of componentmembers situated toward the side where the fifth electrode layer 325 isdisposed from the sixth electroconductive portion 212 (e.g.,power-generating element 320 b, power-generating element 330 a, thirdelectroconductive portion 113, etc.) can be covered by the fourthoverhang portion 221 b of the fourth insulating portion 221. That is tosay, a configuration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the fourth insulating portion 221) are separatelyattached, while suppressing positional deviation of the componentmembers.

The fifth overhang portion forming step S2502 is a step executed afterthe fifth insulating portion folding step S2302. The fifth overhangportion forming step S2502 is a step in which a portion of the fifthinsulating portion 222 is caused by the overhang portion forming unit450 to overhang from the sixth electroconductive portion 212 to the sidewhere the fifth counter electrode layer 324 is disposed, thereby formingthe fifth overhang portion 222 a.

According to the above configuration, the side faces of componentmembers situated toward the side where the fifth counter electrode layer324 is disposed from the sixth electroconductive portion 212 (e.g.,power-generating element 310 b, power-generating element 320 a, secondelectroconductive portion 112, etc.) can be covered by the fifthoverhang portion 222 a of the fifth insulating portion 222. That is tosay, a configuration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the fifth insulating portion 222) are separatelyattached, while suppressing positional deviation of the componentmembers.

Alternatively, the fifth overhang portion forming step S2502 is a stepin which a portion of the fifth insulating portion 222 is caused by theoverhang portion forming unit 450 to overhang from the seventhelectroconductive portion 213 to the side where the sixth electrodelayer 335 is disposed, thereby forming the fifth overhang portion 222 b.

According to the above configuration, the side faces of componentmembers situated toward the side where the sixth electrode layer 335 isdisposed from the seventh electroconductive portion 213 (e.g.,power-generating element 330 b, fourth electroconductive portion 114,etc.) can be covered by the fifth overhang portion 222 b of the fifthinsulating portion 222. That is to say, a configuration where side facesof the battery are covered can be realized more conveniently and lessexpensively as compared to a case of using a process where individualinsulating members (i.e., members different from the fifth insulatingportion 222) are separately attached, while suppressing positionaldeviation of the component members.

Note that the order of execution of the fourth overhang portion formingstep S2501 and fifth overhang portion forming step S2502 may beoptionally decided.

The overhang portion forming unit 450 may have overhang portion formingmembers (e.g., pressing plate, roller, etc.), for example. The overhangportion forming unit 450 may form the overhang portions by pressing theoverhang portion forming members against the insulating portions. Forexample, the battery 2500 according to the second embodiment may bemanufactured by pressing the insulating portions by the overhang portionforming members. Alternatively, the battery 2600 according to the secondembodiment may be manufactured by pressing the insulating members by theoverhang portion forming members (e.g., moving the overhang portionforming members) from the side where the first electroconductive portion111 is situated toward the side where the fourth electroconductiveportion 114 is situated, for example. Alternatively, the battery 2700according to the second embodiment may be manufactured by pressing theinsulating members by the overhang portion forming members (e.g., movingthe overhang portion forming members) from the side where the fourthelectroconductive portion 114 is situated toward the side where thefirst electroconductive portion 111 is situated, for example.

Note that the first overhang portion forming step S1501, second overhangportion forming step S1502, and third overhang portion forming stepS1503 may be performed along with the fourth overhang portion formingstep S2501 and fifth overhang portion forming step S2502.

According to the above configuration, the side face where the firstinsulating portion 121, second insulating portion 122, and thirdinsulating portion 123 are situated can be covered by the firstinsulating portion 121, second insulating portion 122, and thirdinsulating portion 123, while covering the side where the fourthinsulating portion 221 and fifth insulating portion 222 are situated bythe fourth insulating portion 221 and fifth insulating portion 222.

Note that the second current collector 200 may have the sixth insulatingportion 223 linked to the seventh electroconductive portion 213.

The fourth insulating portion 221 and sixth insulating portion 223 maybe in contact with each other due to the fourth overhang portion formingstep S2501 at this time.

According to the above configuration, the side faces of componentmembers interposed between the sixth electroconductive portion 212 andseventh electroconductive portion 213 (e.g., power-generating element320 b, power-generating element 330 a, third electroconductive portion113, etc.) can be covered by at least one of the fourth insulatingportion 221 and sixth insulating portion 223. That is to say, aconfiguration where side faces of the battery are covered can berealized more conveniently and less expensively as compared to a case ofusing a process where individual insulating members (i.e., membersdifferent from the fourth insulating portion 221 and sixth insulatingportion 223) are separately attached, while suppressing positionaldeviation of the component members.

Note that the fourth insulating portion 221 and sixth insulating portion223 may come into contact with each other by the fourth overhang portion221 b being formed in the fourth overhang portion forming step S2501,and the fourth overhang portion 221 b and the sixth overhang portion 223a of the sixth insulating portion 223 coming into contact with eachother (e.g., FIG. 31).

Alternatively, the fourth insulating portion 221 and sixth insulatingportion 223 may come into contact with each other by the fourth overhangportion 221 b being formed in the fourth overhang portion forming stepS2501, and the fourth overhang portion 221 b and the sixth insulatingportion 223 coming into contact with each other (e.g., FIG. 32).

Note that the fourth insulating portion 221 and sixth insulating portion223 may come into contact with each other by the sixth overhang portion223 a being formed at the sixth insulating portion 223, and the fourthinsulating portion 221 and sixth overhang portion 223 a coming intocontact with each other (e.g., FIG. 33).

The insulating portion shrinking unit 460 may shrink the fourthinsulating portion 221 and fifth insulating portion 222.

FIG. 70 is a flowchart illustrating an example of a batterymanufacturing method according to the third embodiment.

The battery manufacturing method illustrated in FIG. 70 further includesthe following steps, in addition to the steps of the above-describedbattery manufacturing method illustrated in FIG. 66.

That is to say, the battery manufacturing method illustrated in FIG. 70further includes a fourth insulating portion shrinking step S2601 (i.e.,a step (e4)), and a fifth insulating portion shrinking step S2602 (i.e.,a step (e5)).

The fourth insulating portion shrinking step S2601 is a step executedafter the fourth insulating portion folding step S2301. The fourthinsulating portion shrinking step S2601 is a step for shrinking thefourth insulating portion 221 by the insulating portion shrinking unit460.

According to the above configuration, by shrinking the fourth insulatingportion 221, the bonding between component members of the battery can bemade even stronger by the fourth insulating portion 221.

The fifth insulating portion shrinking step S2602 is a step executedafter the fifth insulating portion folding step S2302. The fifthinsulating portion shrinking step S2602 is a step for shrinking thefifth insulating portion 222 by the insulating portion shrinking unit460.

According to the above configuration, by shrinking the fifth insulatingportion 222, the bonding between component members of the battery can bemade even stronger by the fifth insulating portion 222.

The fourth insulating portion 221 and fifth insulating portion 222 mayinclude thermal-shrinking material. The method for shrinking the firstinsulating portion 121, second insulating portion 122, and thirdinsulating portion 123, described above, may be used as the method forshrinking the fourth insulating portion 221 and fifth insulating portion222.

Note that in the third embodiment, the electrode layer forming unit 410,counter electrode layer forming unit 420, and solid electrolyte layerforming unit 440 may each have, for example, a discharging mechanism(e.g., a discharge orifice) that discharges coating material (e.g.,electrode material, counter electrode material, solid electrolytematerial, etc.), a supply mechanism (e.g., a tank and supply tube) thatsupplies the coating material to the discharge mechanism, a conveyancemechanism (e.g., a roller) that conveys an object to be coated or thelike, a pressing mechanism (e.g., a pressing stand and a cylinder) thatapplies pressure for compression, and so forth. Commonly knownapparatuses and members may be used for these mechanisms as appropriate.

Note that in the third embodiment, the current collector folding unit430 may be provided with, for example, a folding mechanism (e.g., rodmember, wire member, etc.) that folds an object of folding, a conveyingmechanism (e.g., roller) that conveys the object of folding, and soforth. Commonly known apparatuses and members may be used for thesemechanisms as appropriate.

Note that in the third embodiment, the laminating unit 470 may beprovided with, for example, a conveying mechanism (e.g., roller) thatmoves an object of laminating (e.g., the first current collector 100 andsecond current collector 200) or the like, and adjusting mechanism thatadjusts the position of the object of laminating, and so forth. Commonlyknown apparatuses and members may be used for these mechanisms asappropriate.

Note that the battery manufacturing apparatus according to the thirdembodiment may further have a control unit 500. The control unit 500controls operations of the electrode layer forming unit 410, counterelectrode layer forming unit 420, current collector folding unit 430,solid electrolyte layer forming unit 440, overhang portion forming unit450, insulating portion shrinking unit 460, and laminating unit 470.

The control unit 500 may be configured of a processor and memory, forexample. The processor may be a central processing unit (CPU) ormicroprocessor unit (MPU) or the like, for example. The processor mayexecute the control method (battery manufacturing method) disclosed inthe present disclosure by reading out and executing programs stored inthe memory.

Note that the battery manufacturing method according to the thirdembodiment is not restricted to coating for the electrode layers,counter electrode layers, and solid electrolyte layers. These may beformed by other techniques (e.g., sequential laminating, applying twoobjects to each other, transferring, etc.), or by combinations ofcoating and other techniques, and so forth.

Note that in the battery manufacturing method according to the thirdembodiment, the power-generating elements may be pressed by a press orthe like, after the folding steps or the like. This can realize higherpacking density and stronger adhesion. That is to say, applying pressurein the layer direction of the layers enables making the layers moreprecise and in a better bonding state with each other.

Also, in the battery manufacturing method according to the thirdembodiment, part of the insulating portions (or all of the insulatingportions) may be removed (e.g., cut) after the folding step or the like.Accordingly, energy density by volume and energy density by weight ofthe battery can be further improved.

The battery according to the present disclosure can be used as a battery(e.g., fully-solid secondary battery) for electronic equipment, electricappliances, electric vehicles, and so forth.

What is claimed is:
 1. A battery, comprising: a first current collector;a first electrode layer; a second electrode layer; a first counterelectrode layer; and a second counter electrode layer; wherein the firstcounter electrode layer and the second counter electrode layer are acounter electrode of the first electrode layer and the second electrodelayer, wherein the first current collector includes a firstelectroconductive portion, a second electroconductive portion, a thirdelectroconductive portion, a first insulating portion, and a secondinsulating portion, wherein the first electrode layer is disposed incontact with the first electroconductive portion, wherein the secondelectrode layer is disposed in contact with the second electroconductiveportion, wherein the first counter electrode layer is disposed incontact with the second electroconductive portion, wherein the secondcounter electrode layer is disposed in contact with the thirdelectroconductive portion, wherein the first insulating portion linksthe first electroconductive portion and the second electroconductiveportion, wherein the second insulating portion links the secondelectroconductive portion and third electroconductive portion, whereinthe first current collector is folded at the first insulating portion,whereby the first electrode layer and the first counter electrode layerare positioned facing each other, wherein the first current collector isfolded at the second insulating portion, whereby the second electrodelayer and second counter electrode layer are positioned facing eachother, and wherein the first insulating portion and the secondinsulating portion are not in direct physical contact with any of thefirst electrode layer, the second electrode layer, the first counterelectrode layer, and the second counter electrode layer.
 2. The batteryaccording to claim 1, further comprising: a third electrode layer and athird counter electrode layer, wherein the third counter electrode layeris a counter electrode of the first electrode layer, second electrodelayer, and third electrode layer, wherein the first current collectorincludes a third insulating portion and a fourth electroconductiveportion, wherein the third electrode layer is disposed in contact withthe third electroconductive portion, wherein the third counter electrodelayer is disposed in contact with the fourth electroconductive portion,wherein the third insulating portion links the third electroconductiveportion and the fourth electroconductive portion, and wherein the firstcurrent collector is folded at the third insulating portion, whereby thethird electrode layer and third counter electrode layer are positionedfacing each other.
 3. The battery according to claim 2, wherein thefirst insulating portion has a first overhang portion that overhangsfrom the second electroconductive portion toward the side where thesecond electrode layer is disposed, wherein the second insulatingportion has a second overhang portion that overhangs from the secondelectroconductive portion toward the side where the first counterelectrode layer is disposed, or that overhangs from the thirdelectroconductive portion toward the side where the third electrodelayer is disposed, and wherein the third insulating portion has a thirdoverhang portion that overhangs from the third electroconductive portiontoward the side where the second counter electrode layer is disposed. 4.The battery according to claim 2, wherein the first insulating portionand the third insulating portion are in contact with each other.
 5. Thebattery according to claim 2, further comprising: a first solidelectrolyte layer; a second solid electrolyte layer; and a third solidelectrolyte layer, wherein the first solid electrolyte layer is situatedbetween the first electrode layer and the first counter electrode layer,wherein the second solid electrolyte layer is situated between thesecond electrode layer and the second counter electrode layer, andwherein the third solid electrolyte layer is situated between the thirdelectrode layer and third counter electrode layer.
 6. The batteryaccording to claim 2, wherein the first insulating portion, the secondinsulating portion, and the third insulating portion are not in directphysical contact with any of the first electrode layer, the secondelectrode layer, the third electrode layer, the first counter electrodelayer, the second counter electrode layer, and the third counterelectrode layer.